SEC. 2. Section 4 of Republic Act Numbered Three thousand eighty-nine is hereby amended to read as follows:
"SEC. 4. Gold producers qualified to receive assistance.—To be entitled to the assistance provided in this Act, a gold producer must sell to the Central Bank, and the Central Bank is hereby directed to purchase, its entire production of newly-mined gold, whether produced as principal product or as by-product, at the official price defined in Section 2(r) hereof. Should a gold producer sell his gold in violation of this section at any time during a certain year, the entire production for that year shall not be entitled to assistance. Any assistance already given shall be refunded, and the manager or person in-charge of the mining corporation that sells its gold produce or part thereof in violation of this section shall, upon conviction, be punished by a fine of not more than P5,000 or an imprisonment of not more than two years or both in the discretion of the court. The Central Bank shall issue a receipt for all good purchased by it under this Act, which receipt shall show the number of ounces of gold purchased: Provided, That mines producing gold as by-product shall only be entitled to the assistance given to over-marginal gold mines."