Customs duty exemption for specified seamless stainless steel imports conditioned on registration, bond, and use certification. Exempts seamless hot finished stainless steel pipes and tubes under the designated tariff sub heading from customs duty above a specified ad valorem rate when imported for manufacture of cold drawn seamless tubes and pipes, subject to three conditions: a registration certificate from a designated industrial adviser confirming manufacturer status; execution of a bond to secure payment of duty on quantities not used for the eligible manufacture; and production, within the prescribed period, of a certificate from the Assistant Collector of Central Excise verifying that the imported goods were used for the stated purpose. The exemption is limited to goods meeting the annexed dimensional specifications.