"Approved," when used in conjunction with any material, appliance, or type of construction, means:
A. Meeting the approval of the city building inspector and fire chief as the result of investigations of tests conducted by a nationally recognized testing agency; or
B. By reason of accepted principles and standards established by national authorities, technical, health or scientific organizations or agencies.
(Prior code § 17.08.020 (Ord. 503 § 1.5(1), 1961))