SSR 05-1c
          
                                                U.S.
               SUPREME COURT DECISION RULING
         SSR 05-1c: The Social Security Act, Sections 223(d)(2)(A)
               and 1614(a)(3)(B), as Amended (42 U.S.C. 423(d)(2)(A) and 1382c(a)(3)(B)—Disability
               Insurance Benefits and Supplemental Security Income—Whether
               Past Relevant Work Must Exist in Significant Numbers in the National Economy
          
         SSR 05-1c: THE SOCIAL SECURITY ACT, SECTIONS 223(d)(2)(A) AND 1614(a)(3)(B), AS AMENDED
            (42 U.S.C. 423(d)(2)(A) AND1382c(a)(3)(B))— DISABILITY INSURANCE BENEFITS AND SUPPLEMENTAL
            SECURITY INCOME—WHETHER PAST RELEVANT WORK MUST EXIST IN SIGNIFICANT NUMBERS IN THE
            NATIONAL ECONOMY
         
         20 CFR
               404.1520, 404.1560(B), 416.920, and 416.960(b)
         This Ruling concerns the Social Security Administration's (SSA) interpretation of
            sections 223(d)(2)(A) and 1614(a)(3)(B) of the Social Security Act (42 U.S.C. 423(d)(2)(A) and 1382c(a)(3)(B)) that a claimant
            who remains physically and mentally able to perform his or her past relevant work
            will be found not disabled (see 20 CFR 404.1520 and 416.920), regardless of whether that previous work exists in the national economy.
         
         In June 1996, the claimant applied for Social Security disability insurance benefits
            and for Supplemental Security Income, alleging disability due to heart disease and
            cervical and lumbar radiculopathy. She had worked as an elevator operator for 6 years
            until her job was eliminated in August 1995. The SSA denied her claim at the initial
            and reconsideration levels of adjudication and she requested a hearing before an Administrative
            Law Judge (ALJ). The ALJ found that she was not under a disability because her impairments
            did not prevent her from performing her past work as an elevator operator. The ALJ
            rejected the claimant's argument that she was not able to do her past work because
            it no longer existed in significant numbers in the national economy. The SSA's Appeals
            Council denied the claimant's request for review. The United States District Court
            for the District of New Jersey affirmed the ALJ's findings, concluding that whether
            the old job exists is irrelevant under SSA's regulations. The Court of Appeals for
            the Third Circuit reversed and remanded, holding that the statute unambiguously provides
            that the ability to perform prior work disqualifies a claimant from benefits only
            if the work is “substantial gainful work which exists in the national economy.”
         
         The Supreme Court of the United States (the Court) held that 42 U.S.C. 423(d)(2)(A)
            and 1382c(a)(3)(B) do not require a different interpretation and that, because SSA's
            regulations (20 CFR 404.1520, 404.1560(b), 416.920, and 416.960(b)) are a reasonable interpretation of the text of the Act, they must be deferred to
            and given effect.
         
         Cite as: 540 U. S. 20 (2003)
         Opinion of the Court
         Supreme Court of the United States
         --------
         No. 02-763
         --------
         JO ANNE B. BARNHART, COMMISSIONER OF SOCIAL SECURITY, PETITIONER v. PAULLINE THOMAS
         ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR THE THIRD CIRCUIT
         [November 12, 2003]
         JUSTICE SCALIA delivered the opinion of the Court.
         Under the Social Security Act, the Social Security Administration (SSA) is authorized
            to pay disability insurance benefits and Supplemental Security Income to persons who
            have a “disability.” A person qualifies as disabled, and thereby eligible for such
            benefits, “only if his physical or mental impairment or impairments are of such severity
            that he is not only unable to do his previous work but cannot, considering his age,
            education, and work experience, engage in any other kind of substantial gainful work
            which exists in the national economy.” 42 U.S.C. §§423(d)(2)(A), 1382c(a)(3)(B). The
            issue we must decide is whether the SSA may determine that a claimant is not disabled
            because she remains physically and mentally able to do her previous work, without
            investigating whether that previous work exists in significant numbers in the national
            economy.
         
                                                                             I
         Pauline Thomas worked as an elevator operator for six years until her job was eliminated
            in August 1995. In June 1996, at age 53, Thomas applied for disability insurance benefits
            under Title II and Supplemental Security Income under Title XVI of the Social Security
            Act. See 49 Stat. 622, as amended, 42 U.S.C. §401 et
               seq. (Title II); as added, 86 Stat. 1465, and as amended, §1381 et
               seq. (Title XVI). She claimed that she suffered from, and was disabled by, heart disease
            and cervical and lumbar radiculopathy.
         
         After the SSA denied Thomas's application initially and on reconsideration, she requested
            a hearing before an Administrative Law Judge (ALJ). The ALJ found that Thomas had
            “hypertension, cardiac arrhythmia, [and] cervical and lumbar strain/sprain.” Decision
            of ALJ 5, Record 15. He concluded, however, that Thomas was not under a “disability”
            because her “impairments do not prevent [her] from performing her past relevant work
            as an elevator operator.” Id., at 6, Record 16. He rejected Thomas's argument that she is unable to do her previous
            work because that work no longer exists in significant numbers in the national economy.
            The SSA's Appeals Council denied Thomas's request for review.
         
         Thomas then challenged the ALJ's ruling in the United States District Court for the
            District of New Jersey, renewing her argument that she is unable to do her previous
            work due to its scarcity. The District Court affirmed the ALJ, concluding that whether
            Thomas's old job exists is irrelevant under the SSA's regulations. Thomas
               v. Apfel, Civ. No. 99-2234 (Aug. 17, 2000). The Court of Appeals for the Third Circuit, sitting
            en banc, reversed and remanded. Over the dissent of three of its members, it held
            that the statute unambiguously provides that the ability to perform prior work disqualifies
            from benefits only if it is “substantial gainful work which exists in the national
            economy.” 294 F. 3d 568, 572 (2002). That holding conflicts with the decisions of
            four other Courts of Appeals. See Quang Van Han v. Bowen, 882 F. 2d 1453, 1457 (CA9 1989); Garcia v. Secretary of Health and Human Services, 46 F. 3d 552, 558 (CA6 1995); Pass v. Chater, 65 F. 3d 1200, 1206-1207 (CA4 1995); Rater v. Chater, 73 F. 3d 796, 799 (CA8 1996). We granted the SSA's petition for certiorari. 537
            U.S. 1187 (2003).
         
                                                                            II
         As relevant to the present case, Title II of the Act defines “disability” as the “inability
            to engage in any substantial gainful activity by reason of any medically determinable
            physical or mental impairment which can be expected to result in death or which has
            lasted or can be expected to last for a continuous period of not less than 12 months.”
            42 U.S.C. §423(d)(1)(A). That definition is qualified, however, as follows:
         
         “An individual shall be determined to be under a disability only if his physical or
            mental impairment or impairments are of such severity that he is not only unable to do his
               previous work but cannot, considering his age, education, and work experience, engage in any other kind of substantial
               gainful work which exists in the national economy....” §423(d)(2)(A) (emphasis added).
         
         “[W]ork which exists in the national economy” is defined to mean “work which exists
            in significant numbers either in the region where such individual lives or in several
            regions of the country.” Ibid. Title XVI of the Act, which governs Supplemental Security
            Income benefits for disabled indigent persons, employs the same definition of “disability”
            used in Title II, including a qualification that is verbatim the same as §423(d)(2)(A).
            See 42 U.S.C. §1382c(a)(3)(B). For simplicity's sake, we will refer only to the Title
            II provisions, but our analysis applies equally to Title XVI.
         
         Section 423(d)(2)(A) establishes two requirements for disability. First, an individual's
            physical or mental impairment must render him “unable to do his previous work.” Second,
            the impairment must also preclude him from “engag[ing] in any other kind of substantial
            gainful work.” The parties agree that the latter requirement is qualified by the clause that immediately follows it—“which exists
            in the national economy.” The issue in this case is whether that clause also qualifies
            “previous work.”
         
         The SSA has answered this question in the negative. Acting pursuant to its statutory
            rulemaking authority, 42 U.S.C. §§405(a) (Title II), 1383(d)(1) (Title XVI), the agency
            has promulgated regulations establishing a five-step sequential evaluation process
            to determine disability. See 20 CFR §404.1520 (2003) (governing claims for disability insurance benefits); §416.920 (parallel regulation
            governing claims for Supplemental Security Income). If at any step a finding of disability
            or non-disability can be made, the SSA will not review the claim further. At the first
            step, the agency will find non-disability unless the claimant shows that he is not
            working at a “substantial gainful activity.” §§404.1520(b), 416.920(b). At step two,
            the SSA will find non-disability unless the claimant shows that he has a “severe impairment,”
            defined as “any impairment or combination of impairments which significantly limits
            [the claimant's] physical or mental ability to do basic work activities.” §§404.1520(c),
            416.920(c). At step three, the agency determines whether the impairment which enabled
            the claimant to survive step two is on the list of impairments presumed severe enough
            to render one disabled; if so, the claimant qualifies. §§404.1520(d), 416.920(d).
            If the claimant's impairment is not on the list, the inquiry proceeds to step four,
            at which the SSA assesses whether the claimant can do his previous work; unless he
            shows that he cannot, he is determined not to be disabled.[1] If the claimant survives the fourth stage, the fifth, and final, step requires the
            SSA to consider so-called “vocational factors” (the claimant's age, education, and
            past work experience), and to determine whether the claimant is capable of performing
            other jobs existing in significant numbers in the national economy. §§404.1520(f),
            404.1560(c), 416.920(f), 416.960(c).[2]
         As the above description shows, step four can result in a determination of no disability
            without inquiry into whether the claimant's previous work exists in the national economy;
            the regulations explicitly reserve inquiry into the national economy for step five.
            Thus, the SSA has made it perfectly clear that it does not interpret the clause “which
            exists in the national economy” in §423(d)(2)(A) as applying to “previous work.”[3] The issue presented is whether this agency interpretation must be accorded deference.
         
         As we held in Chevron U.S.A. Inc. v. Natural Resources
               Defense Council, Inc., 467 U.S. 837, 843 (1984), when a statute speaks clearly to the issue at hand we
            “must give effect to the unambiguously expressed intent of Congress,” but when the
            statute “is silent or ambiguous” we must defer to a reasonable construction by the
            agency charged with its implementation. The Third Circuit held that, by referring
            first to “previous work” and then to “any
               other kind of substantial gainful work which exists in the national economy,” 42 U.S.C.
            §423(d)(2)(A) (emphasis added), the statute unambiguously indicates that the former
            is a species of the latter. “When,” it said, “a sentence sets out one or more specific
            items followed by 'any other' and a description, the specific items must fall within
            the description.” 294 F. 3d, at 572. We disagree. For the reasons discussed below
            the interpretation adopted by SSA is at least a reasonable construction of the text
            and must therefore be given effect.
         
         The Third Circuit's reading disregards—indeed, is precisely contrary to—the grammatical
            “rule of the last antecedent,” according to which a limiting clause or phrase (here,
            the relative clause “which exists in the national economy”) should ordinarily be read
            as modifying only the noun or phrase that it immediately follows (here, “any other
            kind of substantial gainful work”). See 2A N. Singer, Sutherland on Statutory Construction
            §47.33, p. 369 (6th rev. ed. 2000) (“Referential and qualifying words and phrases,
            where no contrary intention appears, refer solely to the last antecedent”). While
            this rule is not an absolute and can assuredly be overcome by other indicia of meaning,
            we have said that construing a statute in accord with the rule is “quite sensible
            as a matter of grammar.” Nobelman v. American Savings Bank, 508 U.S. 324, 330 (1993). In FTC v. Mandel Brothers, Inc., 359 U.S. 385 (1959), this Court employed the rule to interpret a statute strikingly
            similar in structure to §423(d)(2)(A)—a provision of the Fur Products Labeling Act,
            15 U.S.C. §69, which defined “'invoice'” as “'a written account, memorandum, list,
            or catalog . . . transported or delivered to a purchaser, consignee, factor, bailee,
            correspondent, or agent, or
               any other person who is engaged in dealing commercially in fur products
               or furs'” 359 U.S., at 386 (quoting 15 U.S.C. §69(f)) (emphasis added). Like the Third Circuit
            here, the Court of Appeals in Mandel Brothers had interpreted the phrase “'any other'”
            as rendering the relative clause (“'who is engaged in dealing commercially'”) applicable
            to all the specifically listed categories. 359 U.S., at 389. This Court unanimously
            reversed, concluding that the “limiting clause is to be applied only to the last antecedent.”
            Id., at 389, and n. 4 (citing 2 J. Sutherland, Statutory Construction §4921 (3d ed. 1943)).
         
         An example will illustrate the error of the Third Circuit's perception that the specifically
            enumerated “previous work” “must” be treated the same as the more general reference
            to “any other kind of substantial gainful work.” 294 F. 3d, at 572. Consider, for
            example, the case of parents who, before leaving their teenage son alone in the house
            for the weekend, warn him, “You will be punished if you throw a party or engage in
            any other activity that damages the house.” If the son nevertheless throws a party
            and is caught, he should hardly be able to avoid punishment by arguing that the house
            was not damaged. The parents proscribed (1) a party, and (2) any other activity that
            damages the house. As far as appears from what they said, their reasons for prohibiting
            the home-alone party may have had nothing to do with damage to the house—for instance,
            the risk that underage drinking or sexual activity would occur. And even if their
            only concern was to prevent damage, it does not follow from the fact that the same
            interest underlay both the specific and the general prohibition that proof of impairment
            of that interest is required for both. The parents, foreseeing that assessment of
            whether an activity had in fact “damaged” the house could be disputed by their son,
            might have wished to preclude all argument by specifying and categorically prohibiting
            the one activity—hosting a party— that was most likely to cause damage and most likely
            to occur.
         
         The Third Circuit suggested that interpreting the statute as does the SSA would lead
            to “absurd results.” Ibid. See also Kolman v. Sullivan, 925 F. 2d 212, 213 (CA7 1991) (the fact that a claimant could perform a past job
            that no longer exists would not be “a rational ground for denying benefits”. The court
            could conceive of “no plausible reason why Congress might have wanted to deny benefits
            to an otherwise qualified person simply because that person, although unable to perform
            any job that actually exists in the national economy, could perform a previous job
            that no longer exists.” 294 F. 3d, at 572-573. But on the very next page the Third
            Circuit conceived of just such a plausible reason, namely, that “in the vast majority of cases, a claimant
            who is found to have the capacity to perform her past work also will have the capacity
            to perform other types of work.” Id., at 574, n. 5. The conclusion which follows is that Congress could have determined
            that an analysis of a claimant's physical and mental capacity to do his previous work
            would “in the vast majority of cases” serve as an effective and efficient administrative
            proxy for the claimant's ability to do some work that does exist in the national economy. Such a proxy is useful because the
            step-five inquiry into whether the claimant's cumulative impairments preclude him
            from finding “other” work is very difficult, requiring consideration of “each of th[e]
            [vocational] factors and . . . an individual assessment of each claimant's abilities
            and limitations,” Heckler v. Campbell, 461 U.S. 458, 460-461, n. 1 (1983) (citing 20 CFR §§404.1545- 1404.1565 (1982)). There is good reason to use a workable proxy that avoids the more expansive
            and individualized step-five analysis. As we have observed, “[t]he Social Security
            hearing system is 'probably the largest adjudicative agency in the western world.'.
            . . The need for efficiency is self-evident.“ 461 U.S., at 461, n. 2 (citation omitted).
         
         The Third Circuit rejected this proxy rationale because it would produce results that
            “may not always be true, and . . . may not be true in this case.” 294 F. 3d, at 576.
            That logic would invalidate a vast number of the procedures employed by the administrative
            state. To generalize is to be imprecise. Virtually every legal (or other) rule has
            imperfect applications in particular circumstances. Cf. Bowen v. Yuckert, 482 U.S. 137, 157 (1987) (O.CONNOR, J., concurring) (“To be sure the Secretary faces
            an administrative task of staggering proportions in applying the disability benefits
            provisions of the Social Security Act. Perfection in processing millions of such claims
            annually is impossible”). It is true that, under the SSA's interpretation, a worker
            with severely limited capacity who has managed to find easy work in a declining industry
            could be penalized for his troubles if the job later disappears. It is also true,
            however, that under the Third Circuit's interpretation, impaired workers in declining
            or marginal industries who cannot do “other” work could simply refuse to return to
            their jobs—even though the jobs remain open and available—and nonetheless draw disability
            benefits. The proper Chevron inquiry is not whether the agency construction can give rise to undesirable results
            in some instances (as here both constructions can), but rather whether, in light of the alternatives, the agency
            construction is reasonable. In the present case, the SSA's authoritative interpretation
            certainly satisfies that test.
         
         We have considered respondent's other arguments and find them to be without merit.
         * * * *
         We need not decide today whether §423(d)(2)(A) compels the interpretation given it
            by the SSA. It suffices to conclude, as we do, that §423(d)(2)(A) does not unambiguously
            require a different interpretation, and that the SSA's regulation is an entirely reasonable
            interpretation of the text. The judgment of the Court of Appeals is reversed.
         
         It is so ordered.
         Justice Scalia delivered the opinion for a unanimous Court.
         _____________________________________________________________________________
         [1] The four-step instructions to the claimant read as follows: “If we cannot make a
            decision based on your current work activity or on medical facts alone, and you have
            a severe impairment(s), we then review your residual functional capacity and the physical
            and mental demands of the work you have done in the past. If you can still do this
            kind of work, we will find that you are not disabled.” 20 CFR §§404.1520(e), 416.920(e)(2003).
         
          [2] In regulations that became effective on September 25, 2003, the SSA amended certain
            aspects of the five-step process in ways not material to this opinion. The provisions
            referred to as subsections (e) and (f) in this opinion are now subsections (f) and
            (g).
         
         [3] This interpretation was embodied in the regulations that first established the five-step
            process in 1978, see 43 FR 55349 (codified, as amended, at 20 CFR §§404.1520 and 416.920 (1982)). Even before enactment of §423(d)(2)(A) in 1967, the SSA disallowed disability
            benefits when the inability to work was caused by “technological changes in the industry
            in which [the claimant] has worked.” 20 CFR §404.1502(b) (1961).