California Code, Labor Code - LAB § 204a

When workers are engaged in an employment that normally involves working for several employers in the same industry interchangeably, and the several employers, or some of them, cooperate to establish a plan for the payment of wages at a central place or places and in accordance with a unified schedule of pay days, all the provisions of this chapter except 201, 202, and 208 shall apply. All such workers, including those who have been discharged and those who quit, shall receive their wages at such central place or places.

This section shall not apply to any such plan until 10 days after notice of their intention to set up such a plan shall have been given to the Labor Commissioner by the employers who cooperate to establish the plan. Having once been established, no such plan can be abandoned except after notice of their intention to abandon such plan has been given to the Labor Commissioner by the employers intending to abandon the plan.