CA SB1303

Prohibits private labor compliance entities from providing compliance services to an awarding body if they have conflicts of interest, defined as performing work for both the awarding body and a contractor bidding the same project.

Requires private labor compliance entities to submit a signed declaration under penalty of perjury that they have no conflicts of interest before an awarding body enters a public works contract.

Mandates that private labor compliance entities confer with negotiating parties to review applicable law before withholding funds and prohibits withholding amounts exceeding alleged underpayments and penalty assessments.

Requires private labor compliance entities to provide contractors and subcontractors a venue to review and respond to evidence of alleged violations within 20 days of a written request.

Establishes civil penalties of at least $1,000 plus attorney's fees for violations, voids contracts between violating entities and awarding bodies, and creates a private right of action for aggrieved parties including joint labor-management committees with court-awarded attorney's fees for prevailing plaintiffs.