2019 California Standards for Accessible Design Guide (effective January 1, 2020 with July 1, 2021 amendments)

11B-809.9.3 Removable base cabinets.

Knee and toe space complying with Section 11B-306 shall be provided at sinks and work surfaces required to comply with Section 11B-809.9.4.

Exception: Removable base cabinets shall be permitted under sinks and work surfaces provided that all of the following conditions are met:

a) base cabinets can be removed without the use of specialized tools or knowledge;

b) the finish floor extends under the base cabinet; and

c) the walls behind and surrounding the base cabinets are finished.