AN ACT REQUIRING THE GOVERNMENT OR ANY OF ITS POLITICAL SUBDIVISIONS, INSTRUMENTALITIES OR AGENCIES INCLUDING GOVERNMENT-OWNED OR CONTROLLED CORPORATIONS (GOCCS) TO DEDUCT AND WITHOLD THE VALUE-ADDED TAX DUE AT THE RATE OF THREE PERCENT (3%) ON GROSS PAYMENT FOR THE PURCHASE OF GOODS AND SIX PERCENT (6%) ON GROSS RECEIPTS FOR SERVICES RENDERED BY CONTRACTORS.