SECTION 1. Subsection (c) of section nine of Act Numbered Twenty-eight hundred and thirty-three is hereby amended to read as follows:
"SEC. 9. (c) The normal tax hereinbefore imposed shall also be deducted and withheld from fixed or determinable annual or periodical gains, profits, and income derived from interest upon bonds and mortgages, or deeds of trust or other similar obligations of domestic or resident foreign corporations, joint-stock companies, partnerships, joint account (cuentas en participacion), associations, and insurance companies if such bonds, mortgages, or other obligations contain a contract or provision by which the obligor agrees to pay any portion of the tax imposed by this law upon the obligee or to reimburse the obligee for any portion of the tax or to pay the interest without deduction for any tax which the obligor may be required or permitted to pay thereon or to retain therefrom under any law of the Philippine Islands, or of any state or country, whether payable annually or at shorter or longer periods, whether such bonds, obligations or securities had been heretofore or are hereafter issued or marketed, and the interest thereon paid, within or without the Philippine Islands, and whether such interest is payable to a nonresident alien individual or to a citizen or resident of the Philippine Islands, subject to the provisions of the foregoing subdivision (b) of this section requiring the tax to be withheld at the source and deducted from annual income and returned and paid to the Government, unless the person entitled to receive such interest shall file with the withholding agent, on or before February first, a signed notice in writing claiming the benefit of an exemption under section seven of this law."