Cal. Education Code § 17407.5

(a) The governing board of a school district shall not enter into an agreement pursuant to Section 17406 or 17407 with any entity unless the entity provides to the governing board of the school district an enforceable commitment that the entity and its subcontractors at every tier will use a skilled and trained workforce to perform all work on the project or contract that falls within an apprenticeable occupation in the building and construction trades, in accordance with Chapter 2.9 (commencing with Section 2600) of Part 1 of Division 2 of the Public Contract Code. (b) Subdivision (a) shall not apply if any of the following requirements are met: (1) The governing board of the school district has entered into a project labor agreement that will bind all contractors and subcontractors performing work on the project or contract to use a skilled and trained workforce and the entity agrees to be bound by that project labor agreement. (2) The project or contract is being performed under the extension or renewal of a project labor agreement that was entered into by the school district prior to January 1, 2017. (3) The entity has entered into a project labor agreement that will bind the entity and all its subcontractors at every tier performing the project or contract to use a skilled and trained workforce. (c) For purposes of this section, “project labor agreement” has the same meaning as in paragraph (1) of subdivision (b) of Section 2500 of the Public Contract Code.