2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)
11B-503.3.3 Marking.
Access aisles shall be marked with a painted borderline around their perimeter. The area within the borderlines shall be marked with hatched lines a maximum of 36 inches (914 mm) on center in a color contrasting with that of the aisle surface.
[2010 ADA Standards] 503.3.3 Marking. Access aisles shall be marked so as to discourage parking in them.
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