Section 17715 Of Chapter 1. Exemptions From California Penal Code >> Division 2. >> Title 2. >> Part 6. >> Chapter 1.

. The provisions listed in Section 16590 do not apply to any instrument or device that is possessed by a federal, state, or local historical society, museum, or institutional collection that is open to the public if all of the following conditions are satisfied:
  (a) The instrument or device is properly housed.
  (b) The instrument or device is secured from unauthorized handling.
  (c) If the instrument or device is a firearm, it is unloaded.