36 C.F.R. § 1192.161 Moveable aisle armrests.
Title 36 - Parks, Forests, and Public Property
A minimum of 50% of aisle seats, including all moveable or removable seats at wheelchair or mobility aide securement locations, shall have an armrest on the aisle side which can be raised, removed, or retracted to permit easy entry or exit. [63 FR 51700, 51702, Sept. 28, 1998]
Title 36: Parks, Forests, and Public Property
PART 1192—AMERICANS WITH DISABILITIES ACT (ADA) ACCESSIBILITY GUIDELINES FOR TRANSPORTATION VEHICLES
Subpart G—Over-the-Road Buses and Systems
§ 1192.161 Moveable aisle armrests.