Cal. Code Regs. tit. 8, § 3110 – Approval of Hoistway Door Interlocks and Hoistway Door Combination Mechanical Locks and Electric Contacts (Contact Locks).

(a) Methods of Approval.
1. (1) Hoistway door interlocks or hoistway door combination mechanical locks and electric contacts used on installations covered by these regulations shall be of an approved type. The Division of Industrial Safety will classify as “Approved” such hoistway door locking devices that have been approved, listed, labeled, or manufactured as conforming to the standards of the Underwriter's Laboratories, Inc., or similar approved institutions, provided, however, that the division may refuse to approve such devices that do not comply with the requirements of Section 3021.
  1. (A) Drawings and test reports shall be submitted to the division with the request for lock approval.
2. (2) The division may classify as “Approved” hoistway door locking devices which have not been approved, listed, labeled, or manufactured as conforming to the standards of one of the institutions specified in Section 3110(a)(1) upon satisfactory evidence that they are designed and constructed so that they do comply with the requirements of Section 3021.
  1. (A) Drawings and a working model of the lock shall be submitted to the division for approval, together with design data on the component parts of the locking device.