Once Alberta's Petroleum and Natural Gas Conservation Board began operating in 1938, the BA and Gas and Oil Products Limited plants had to change their operations significantly. Only Royalite had a market for its residue of gas stripped of liquids in the Canadian Western Natural Gas distribution system. The other two plants flared or burned off most of their residue gas until the board ruled that only wells connected to a market could be produced, stopping the practice. Since the rule applied only to wells that tapped the oil reservoir's overlying gas cap, the Hartell and Longview plants stayed in operation by processing solution gas, or gas dissolved in oil from the Valley's wells.