Vehicle Code § 21356
ARTICLE 1. Erection and Maintenance
The Department of Transportation or local authorities, with respect to highways under their respective jurisdictions, may erect yield right-of-way signs at the entrances to intersections or highways. Such yield right-of-way signs shall not be erected upon the approaches to more than one of the intersecting streets.
Yield right-of-way signs shall be located at or near the entrance to the intersection or highway where motorists are required to yield the right-of-way.