Section 63, The Customs Regu- Citation

Goods discharged from an importing aircraft or ship Goods ~orfor removal to another port or place shall be constructively remova · warehoused at the port or place of importation and removed to such other port or place in accordance with Part VII : Provided that the Comptroller may generally in regard to any particular port or in any particular case allow such goods to be dealt with as if they were goods intended for transfer from an importing to an exporting aircraft or ship when the provisions of regulation 49 with such modifications as the Comptroller may decide shall apply.