California Code, Health and Safety Code - HSC § 44269.2

(a)(1) The commission, in consultation with the board and the Public Utilities Commission, may require any weight class of battery electric vehicle to be bidirectional-capable if it determines there is a sufficiently compelling beneficial bidirectional-capable use case to the battery electric vehicle operator and electrical grid.

(2) In its analysis, the commission shall consider vehicle readiness and duty cycles required of vehicles operated by essential service providers.