Section 27320 Of Article 2. Gun Show Enforcement And Security Act Of 2000 From California Penal Code >> Division 6. >> Title 4. >> Part 6. >> Chapter 3. >> Article 2.

. (a) Before commencement of a gun show or event, each vendor who will offer for sale firearms manufactured after December 31, 1898, shall provide to the producer all of the following information relative to the vendor, the vendor's employees, and other persons, compensated or not, who will be working or otherwise providing services to the public at the vendor's display space:
  (1) The person's complete name.
  (2) The person's driver's license or state-issued identification card number.
  (3) The person's date of birth.
  (b) The producer shall keep the information at the onsite headquarters of the show or event for the duration of the show or event, and at the producer's regular place of business for two weeks after the conclusion of the show or event. The producer shall make the information available upon request to any sworn peace officer for purposes of the officer's official law enforcement duties.