100. AVERAGE Each utility shall file with the Commission the minimum heating value of gas as a part of its Schedule of Rates or Rules and Regulations.105. TESTS The utility supplying natural gas shall make or shall have made at an accredited laboratory sufficient tests. It shall have access to such tests made by its suppliers so as to determine the heating value.110. LOCATION OF TESTS These tests shall be made at a location or locations which will insure a representative sampling of the gas being sent out to the distribution system.