§ 251. Saving clause. Nothing contained in this chapter shall be construed to repeal any statute of the state or ordinance of the city or rule or regulation of the board of health, not inconsistent with the provisions of this chapter, and the same shall remain in full force and effect, when not inconsistent with the provisions of this chapter, to be construed and operated in harmony with its provisions. The powers which are conferred and the duties which are imposed upon any officer or department of the city under any statute of the state, or any city ordinance which is in force at the time of the taking effect of this chapter shall, if such office or department be abolished by this chapter, be thereafter exercised and discharged by the officer, board or department upon whom is imposed corresponding or like functions, powers and duties under the provisions of this chapter. Where any contract has been entered into by the city prior to the time of the taking effect of this chapter, or any bond or undertaking has been given to or in favor of the city, which contains provisions that the same may be enforced by some officer, board or department therein named, but by the provisions of this chapter such office, board or department is abolished, such contracts, bonds and undertakings shall not in any manner be impaired, but shall continue in full force, and the powers conferred and the duties imposed with reference to the same upon the officer, board or department which has been abolished, shall thereafter be exercised and discharged by the officer, board or department upon whom is conferred or imposed like powers, functions or duties under the provisions of this chapter. The park commission, in any city, which at the time this chapter takes effect, has jurisdiction of its park system, is continued in office notwithstanding the provisions of this chapter, with all the powers and subject to all the duties, conferred and imposed upon such commission by law.