Customs exemption scope narrowed by restricting additional duty relief for materials used in capital goods supplied under international competitive bidding. Amendments to multiple customs exemption notifications modify scope and conditions of tariff relief by inserting a restriction that exemption from additional duty will not apply to materials for manufacture of capital goods supplied to fertilizer plants under international competitive bidding; expanding eligible assistive items for talking books and related equipment; substituting specified ad valorem duty rates for certain table entries; removing select conditions and sub-entries; and omitting numerous table entries to narrow the exemption schedules.