A licensee that permits clients to possess firearms on the facility premises shall do all of the following:
(a) Accept and centrally store a client’s firearm, ammunition, or both.
(b) Retain and centrally store a licensee’s firearm, ammunition, or both.
(c) Clients’ and licensees’ firearms, ammunition, or both shall be centrally stored in the facility and in the following manner:
(1) Firearms shall be centrally stored unloaded, in a locked gun safe, that meets the regulatory standards established by the Department of Justice in Section 4100 of Title 11 of the California Code of Regulations.
(2) Ammunition shall be centrally stored separately in a locked location different from firearms.