|(a) This rule applies only to motor fuel transactions that take place on or after January 1, 2004. Motor fuel transactions that occur prior to January 1, 2004, will be governed by sections in Texas Administrative Code, Title 34, Part 1, Chapter 3, Subchapter L. (b) Temperature adjustment method. For the purpose of conversion of actual gasoline and diesel fuel volume to equivalent volume of 60 degrees Fahrenheit, Table 6B of revised ASTM-API-IP Petroleum Measurement Tables may be used in lieu of any conversion table which the comptroller may issue. (c) Testing and accuracy of meters and thermometers or other devices designed to accurately measure the temperature of fuel. Meters must be tested each 90 days or after 10 million gallons through-put, whichever occurs first. The accuracy of any meter being used must be maintained within 1% of correct volume during all loading or unloading operations. The tests of meters shall be determined by the methods provided by the American Society of Mechanical Engineers-American Petroleum Institute for the Installation, Proving and Operation of Meters in Liquid Hydrocarbon Service. Thermometers or other devices designed to accurately measure the temperature of fuel must be tested each 90 days and must conform to standards set by the American Society of Mechanical Engineers-American Petroleum Institute or National Bureau of Standards. (d) Records. A record of all tests must be maintained and open for examination by the comptroller for a period of four years. (e) Posting of results. The results of the most recent tests on all meters and thermometers or temperature measuring devices being used must be posted in a conspicuous place at each terminal where the tests are required.