Meters for measuring liquefied petroleum gas sold in the vapor state shall be sealed by the manufacturer thereof as hereinafter provided or by a sealer of weights and measures. The Commissioner of Weights and Measures shall prescribe regulations including specifications and tolerances governing the testing and sealing of such meters by the manufacturers and method of determining quantity of liquefied petroleum gas, and may authorize any manufacturer to seal such meters upon written agreement to conform to such regulations. Said commissioner may at any time for cause revoke the authority so given by him to any manufacturer.