(a) Each utility shall install a suitable measuring device at each source of supply in order that a record may be maintained of the quantity produced.
(b) Unless sufficient information is furnished by the utility supplying the gas, each utility purchasing gas shall maintain adequate instruments and meters to obtain complete information as to such purchases.
(c) The utility shall:
(1) Determine on a daily basis the quantity of gas supply produced or purchased and received from each source of supply; and
(2) Summarize those quantities each month.
(d) The utility shall record and transmit to the department its 12 month totals of gas supply purchased, produced, and received as part of its annual report pursuant to En 509.02.