11-1-6: EXEMPTIONS:
   A.   Nothing in this title shall be deemed to require a change in the plans, construction, or designated use of any building for which a building permit has been lawfully issued prior to the effective date hereof, and pursuant to such permit, construction of which is diligently carried to completion. Upon completion, any such building or use not in conformance with these regulations may continue as regulated in section 11-14-2 of this title.
   B.   At any time within two (2) years after the effective date hereof, a building permit may be issued or a use of land commenced in accordance with the terms and conditions of a special use permit or site plan (other than PUD) approved by the city commission or variance granted by the board of adjustment prior to the effective date hereof.
   C.   Poles, wires, cables, conduits, vaults, laterals, pipes, mains, valves, or other similar equipment for distribution to consumers of public utility and communication services, but not including substations and towers located on or above the surface of the ground, shall be exempt from the provisions of these regulations.
   D.   Railroad tracks, signals, bridges, and similar facilities and equipment located on a railroad right of way, and maintenance and repair work on such facilities, shall be exempt from the provisions of these regulations. (Ord. 5916, 8-9-1999)