An administrative law judge (ALJ) uses a preponderance of
the evidence standard when making a decision. As defined in 20
CFR 404.901 and 416.1401,
a preponderance of the evidence means that after considering the
evidence as a whole, the existence of the fact to be proven is more
likely than not.
However, when the Appeals Council (AC) reviews an ALJ's decision,
it uses a substantial evidence standard rather than a preponderance
of the evidence standard. As defined in 20 CFR
404.901 and 416.1401,
substantial evidence means such relevant evidence as a reasonable
mind might accept as adequate to support a conclusion. Substantial
evidence requires less in support of a finding or conclusion than
a preponderance of the evidence.
Under the standard set forth in 20
CFR 404.970 and 416.1470,
the AC will deny the request for review or decline to take own motion
review if substantial evidence supports an ALJ's action, findings,
or conclusions and there is no other basis for review present.