Section 10
SEC. 10. Paragraph (a) of Section Twenty-Five of the same Act is hereby amended to read as follows: "SEC. 25. Applicability and Interpretation. — In interpreting and applying the provisions of this Act, the following rules shall be observed: "(a) Applicability to Existing Enterprises. — An enterprise which satisfies the definition of a 'Philippine National'' engaged in a preferred area of investment at the time of its declaration as such, shall be entitled to registration as to its existing capacity, as well as to such an expansion or enlargement thereof requiring new or additional machinery and equipment as shall be within the unfilled measured capacity of the area; so also, an investor in such an existing enterprise shall be entitled to benefits and incentives to the extent of his present as well as new or additional investment therein: Provided, That the application is filed while the area is still in the Investment Priorities Plan: Provided, however, That the benefits of this Act, so far as may be applicable to such existing enterprises and investors in such existing enterprises, shall be given prospective effect only from the date of registration."