(MARK BALMORES / FILE PHOTO) This, as the Bureau of Customs (BOC) and Bureau of Internal Revenue (BIR) announced Thursday, April 8, their intention to begin field testing on gasoline, diesel, and kerosene in warehouses, storage tanks, gas stations, and other retail outlets beginning April 26. Vessels, tank trucks, and similar fuel transporting vehicles will also be covered by the enforcement activities. The inspection aims to check whether or not the petroleum products contain the required fuel marker level. Those found without the official fuel marker or not containing the required level will be subject to the payment of duties and taxes, as well as appropriate fines and penalties as prescribed under the Tax Reform for Acceleration and Inclusion (TRAIN) Act.