TEMPORARILY GRANTING A COMMON EFFECTIVE PREFERENTIAL TARIFF RATE OF ZERO PERCENT (0%) ON CERTAIN IMPORTED ARTICLES AS PROVIDED FOR UNDER THE TARIFF AND CUSTOMS CODE OF 1978, AS AMENDED, IN ORDER TO IMPLEMENT THE AGREEMENT BETWEEN THE PHILIPPINES AND SINGAPORE ON THE COMPENSATORY ADJUSTMENT MEASURES RELATING TO THE PHILIPPINE SUSPENSION OF CONCESSIONS ON CERTAIN PETROCHEMICAL PRODUCTS