Disability documentation has been an ongoing challenge for Office for Students with Disabilities personnel. Initial lack of consistency and inadequate documentation data resulted in the promulgation of detailed documentation guidelines in the 1990s. Discontinuity between approaches to transition assessment and disability documentation in secondary and postsecondary schools has been exacerbated by court decisions and divergent legal requirements. The recently implemented Americans with Disabilities Act Amendments Act (2008) significantly impacts the postsecondary disability documentation process. The Summary of Performance (SOP) requirement of IDEA 2004 is discussed in regard to the range of data it adds to the review of functional performance and determination of reasonable accommodations. Recommendations regarding the application of the SOP to the new reality of disability documentation are presented.