Section 4
SEC. 4. In the case of aliens employed by regional or area headquarters established in the Philippines by multinational corporations, there shall be deducted and withheld at the source in the same manner and conditions as that provided under Supplement A — Withholding on Wages of Commonwealth Act No. 466, as amended, on the gross salaries, wages, annuities, compensations, remunerations and emoluments from such regional headquarters a tax equal to fifteen per centum of the gross thereof.