The application for a license shall show the size and location of the area to be licensed. If an application is approved and a license is issued, the licensee shall post the boundaries of the licensed area with signs, at intervals of not more than 500 feet, which shall indicate that the area is licensed for the shooting of domesticated migratory game birds. Such signs shall be of a size not less than 12 by 18 inches.
Ca. Fish and Game Code § 3301