2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)
11B-902 Dining surfaces and work surfaces
The tops of dining surfaces and work surfaces shall be 28 inches (711 mm) minimum and 34 inches (864 mm) maximum above the finish floor or ground.
Exception: Dining surfaces and work surfaces that are used primarily by children 5 years and younger shall not be required to comply with Section 11B-902.4 where a clear floor or ground space complying with Section 11B-305 positioned for a parallel approach is provided.
A clear floor space complying with Section 11B-305 positioned for forward approach shall be provided. Knee and toe clearance complying with Section 11B-306 shall be provided, except that knee clearance 24 inches (610 mm) minimum above the finish floor or ground shall be permitted.