PRELIMINARY--INTERPRETATION. 1. This Act shall be known and may be cited as _The Post Office Act_ 1867; and the following terms and expressions therein shall be held to have the meaning hereinafter assigned to them.... The term "Letter" includes Packets of Letters; The term "Postage" means the duty or sum chargeable for the conveyance of Post Letters, Packets and other things by Post; The term "Foreign Country" means any country not included in the dominions of Her Majesty; The term "Foreign Postage" means the postage on the conveyance of Letters, Packets or other things, within any Foreign Country or payable to any Foreign Government; The term "Canada Postage" means the postage on the conveyance of Letters, Packets and other things by Post within the Dominion of Canada or by Canada Mail Packet; The term "Mail" includes every conveyance by which Post Letters are carried, whether it be by land or by water; The term "British Packet Postage" means the postage due on the conveyance of letters by British Packet Boats, between the United Kingdom and British North America;--And the term "British Postage" includes all Postage not being Foreign, Colonial or Canadian; * * * * * The term "Post Letter" means any letter transmitted or deposited in any Post Office to be transmitted by the Post;--And a letter shall be deemed a Post Letter from the time of its being so deposited or delivered at a Post Office, to the time of its being delivered to the party to whom it is addressed.... 2. All Laws in force in the Provinces of Canada, Nova Scotia or New Brunswick, at the Union thereof on the first of July, one thousand eight hundred and sixty-seven, in respect to the Postal Service, and continued in force by the "British North America Act 1867," shall be and the same are hereby repealed. * * * * * ORGANIZATION AND GENERAL PROVISIONS. 7. There shall be at the seat of Government of Canada a Post Office Department for the superintendence and management of the Postal Service of Canada, under the direction of a Postmaster General. 8. The Postmaster General shall be appointed by Commission under the Great Seal of Canada, and shall hold his office during pleasure. * * * * * 10. The Postmaster General may, subject to the provisions of this Act: 1. Establish and close Post Offices and Post Routes; * * * * * 3. Enter into and enforce all contracts relating to the conveyance of the Mails or other business of the Post Office; 4. [_Make regulations concerning mailable matter and limits of weight and dimensions of such._] 5. [_Establish rates of postage and conditions on matter not already provided for._]