The utility's rates are predicated upon the supply of service being rendered separately for each premises and for the ultimate usage in or on the premises. The combining of service through one meter, of two or more separate classifications, or of two or more premises, or of two or more separate living quarters of the same premises will not be permitted except as specifically provided for under these rules and regulations, or supplements thereto, which are filed by the utility and approved by the Public Service Commission of Indiana. An outlying or adjacent building of the customer, if located on the same premises, may be served from the supply to the main building.
PREMISES, as herein used, shall mean the main residence or living quarters for the use of a single-family or main building of a commercial customer, and shall include the outlying or adjacent buildings used by the same, provided the use of service in the outlying buildings is supplemental and similar to the service used in the main residence or building.
('75 Code, § 6.28)