Section 20.07.02.410 - METERS01.General Requirements. Meter fittings of adequate size to measure the gas efficiently for the purpose of obtaining gas-oil ratios shall be installed on the gas vent line of every separator or proper connections made for orifice well tester. Well-head equipment shall be installed and maintained in excellent condition. Valves shall be installed so that pressures can be readily obtained on both casing and tubing.02.Visibility. All required meters shall be accessible and viewable by the Department for the purpose of monitoring daily, monthly and/or cumulative production volumes from individual wells.Idaho Admin. Code r. 20.07.02.410