California Code, Business and Professions Code - BPC § 7598.14

Upon approval of an application for registration, the chief shall cause to be issued to the applicant, at their last known address, a registration card in a form approved by the director. The applicant may request to be issued an enhanced pocket card that shall be composed of a durable material and may incorporate technologically advanced security features.  The bureau may charge a fee sufficient to reimburse the department's costs for furnishing the enhanced license.  The fee charged may not exceed the actual costs for system development, maintenance, and processing necessary to provide this service, and may not exceed six dollars ($6).  If the applicant does not request an enhanced card, the department shall issue a standard card at no cost to the applicant.  Every person, while engaged in any activity for which registration is required, shall display their valid pocket card as provided by regulation.