The purpose of this study was to examine all states' participation guidelines for alternate assessments based on alternate achievement standards (AA-AAS) and to analyze these guidelines for common and contrasting themes. State alternate assessment participation guidelines were found for all 50 states. Participation guidelines were coded, and 12 categories emerged. These categories fell into four major patterns: not included in almost all states' participation guidelines, evenly distributed between being included and not included, included in the majority of states' participation guidelines, and included in almost all states' participation guidelines. This research can help state-level personnel revise and improve their own participation guidelines by providing information about current language used in participation guidelines and can inform the field of the level of consistency in the language used to describe the population who participate in AA-AAS. (Contains 3 tables.)