A last minute proposal was made to tie labor standards into California’s cap-and-trade program that requires corporations to buy permits in order to release greenhouse gas emissions, which will fund a $1.5 Billion plan for spending revenue. The budget includes $140 Million for rebates. If approved, the proposal would require state-appointed regulators to verify the car companies’ fair treatment of their workers for them to be eligible for rebates under cap-and-trade. The proposal was made while Nissan and Tesla are in the middle of heated labor disputes and if approved, would give auto unions greater leverage against car makers.
See "Unions could get a boost from California's cap-and-trade spending proposal", Chris Megerian, The Los Angeles Times, September 12, 2017