(a) The number or designation, which includes the lease name when used, by which a well shall be known is subject to the approval of the Supervisor and shall not be changed without the written consent of the Supervisor.

(b) Identification of wells. The well designation shall be affixed to the wellhead or guard rail of each completed well. Wells completed from two or more zones shall have the zones individually identified at the wellhead. The Supervisor may approve existing well identification methods if they substantially comply with the intent of this section. Identifying signs shall be maintained in a legible condition.

(c) Platforms, islands, or other fixed structures shall be identified at two diagonal corners of the platform or structure by a sign with letters and figures not less than 12 inches in height with the following information: the platform or structure designation, the name of lease operator, and the lease designation. The Supervisor may approve abbreviations.

(d) Non-fixed platforms or structures shall be identified by two (2) signs with letters and figures not less than 12 inches in height affixed to opposite sides of the derrick to be visible from off the vessel with the following information: the name of the operator and the lease designation.