This subchapter contains instructions for documenting nondisability eligibility in
                  supplemental security income (SSI) disability/blindness initial claims that require
                  a disability determination. These instructions are also applicable to aged claims
                  which require a disability/blindness determination to establish eligibility.
               
               The subchapter includes the following items.
               
                  - 
                     
                        • 
                           An explanation of when to use simultaneous development versus deferred development
                              of nondisability factors
                            
 
 
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                        • 
                           The application procedures for simultaneous and deferred development claims 
 
 
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                        • 
                           An explanation of what documentation actions to take with respect to the nondisability
                              issues in simultaneous development and deferred development claims when appeals are
                              filed
                            
 
 
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                        • 
                           When to conduct a preeffectuation review contact (PERC) and procedures for completing
                              PERCs when a disability allowance is received on simultaneous and deferred development
                              claims
                            
 
 
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                        • 
                           Special instructions for certain situations related to adjudicating disability claims,
                              e.g., a description of the manual notice to issue when the medical allowance is the
                              result of a reconsideration
                            
 
 
                  
                     NOTE: Throughout the rest of the subchapter the word “disability” refers also to blindness.