Thus the British copyright and customs law recognizes the subdivision of copyright territory for the exclusive control of a market, and excludes accordingly foreign reprints whether piratical copies or authorized foreign editions like the Tauchnitz series, and the original foreign edition as well. In theory, if not in practice, a Tauchnitz copy in the pocket of a traveler is subject to seizure, and written authority from the copyright proprietor is technically necessary for the importation of a single copy, apparently without exception in favor of the British Government or the libraries. {Sidenote: The new British code} The new British measure continues these provisions as embodied in the customs consolidation act of 1876 and the revenue act of 1889 and in the text of the new act. Copyright is infringed by any person who "imports for sale or hire any work ... which to his knowledge infringes copyright." Importation is prohibited of copies made out of the United Kingdom, which if made therein would infringe copyright and as to which the owner of the copyright gives written notice to the Commissioners of Customs in accordance with regulations by the Commissioners, which regulations may apply to all works or to different classes. The Isle of Man is specifically excepted from the United Kingdom in respect to this section. But the section is made applicable with the necessary modifications to any included British possession in respect to copies made out of that possession. The text of the new measure, retaining the phrase "for sale or hire" from the act of 1842 and reaffirming the customs act of 1876, which makes no such exception, continues an unfortunate ambiguity as to the importation of copies for private use, but precedent and court decisions favor the complete control of the market by the copyright proprietor through the complete exclusion of foreign copies. {Sidenote: Canadian practice}