Sec. 1611. Tariff Nomenclature and Rates of Import Duty. – The provisions of Section 104 on Rates of Import Duty of Presidential Decree No. 1464, otherwise known as the Tariff and Customs Code of the Philippines of 1978, as amended, specifically providing for the tariff section, chapters, headings and subheadings and the rates of import duty, shall still apply and shall supplement this Act. There shall be levied, collected and paid upon all imported goods the rates of duty indicated thereon except as otherwise specifically provided for in this Act: Provided, That the maximum rate shall not exceed one hundred percent (100%) ad valorem.

The rates of duty provided or subsequently fixed pursuant to Sections 1608 and 1609 of this Act shall be subject to periodic investigation by the Tariff Commission and may be revised by the President, upon the recommendation of the NEDA.

It shall be also apply to all products, whether imported directly or indirectly, of all foreign countries, which do not discriminate against Philippine export products. An additional one hundred percent (100%) across-the-board duty shall be levied on the products of any foreign country which discriminates against Philippine export products.