The measure is one of several protocols that are being updated along with relaxed testing and masking requirements in a new agreement that will run until Sept.
After that agreement lapsed June 30, the groups began negotiating ways to loosen the restrictions to facilitate film production.
The return-to-work agreement reached last fall, which includes compensating crew members who take time for testing and for quarantining, has largely allowed the industry to get back to business.
The earlier protocols separated cast and crew on sets into different zones, with different testing and social distancing requirements depending on how closely they had to work together.