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252 be acquired in ownership by the workmen within specified periods.

Art. 124. All powers not expressly vested by this Constitution in the Federal authorities are understood to be reserved to the States.

Art. 125. No person shall hold at the same time two Federal offices or one Federal and one State elective office; if elected to two, he shall choose between them.

Art. 126. No payment shall be made which is not included in the Budget or authorized by a law subsequent to the same.

Art. 127. The President of the Republic, the Justices of the Supreme Court, Representatives and Senators and other public officials of the Federation who are chosen by popular election shall receive a compensation for their services, which shall be paid by the Federal Treasury and determined by law. This compensation may not be waived, and any law increasing or decreasing it shall have no effect during the period for which the functionary holds office.

Art. 128. Every public official, without exception, shall, before entering on the discharge of his