No national standards for measurement were accepted until the early 1930’s. The use of installation and volumetric calculation procedures required an individual contract agreement for each custody transfer delivery. The founders of the American Gas Association (AGA) commissioned research by the United States National Bureau Standards (NBS) to develop data that would lead to their first orifice meter standard, AGA Report No. 1. The AGA issued the first revision of the orifice meter standard Report No. 2 later in the 1930’s. In 1963, the initial version of AGA Report No. 3 governing orifice measurement was published. AGA voted to retain the title, AGA Report No. 3 for all subsequent revision