27.44.040 CONDITIONS OF USE.
Permitted uses and special uses in the E1 districts are subject to the following conditions:
(a) All public utility service connections to structures and facilities shall be located underground in accordance with specifications to be approved by the Director of Public Works and in accordance with the rules and regulations applicable thereto as approved by the Public Utilities Commission of the State;
(b) All uses permitted within this district shall be conducted within completely enclosed buildings and shall be subject to the same "performance standards" set forth in Chapter 27.56, except as may be specifically authorized by special permit.