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423. The applicable accessibility standard may depend on whether the structure is a government or public facility or a private dwelling. If applicable, the ADA Accessibility Standards and/or Architectural Barriers (ABA) Act Accessibility Standards would apply, although ADA and ABA standards are substantially the same. See U.S. Access Board, The Architectural Barriers Act. If no standards apply, accessibility features should conform with the ADA Accessibility Standards unless stated otherwise in state or local codes.