The City of Saugatuck and its officers shall be vested with any and all powers and immunities, expressed and implied, which cities and their officers are, or hereafter may be, permitted to exercise or to provide for in their charters under the Constitution and Laws of the State of Michigan, including all the powers and immunities which are granted to cities and officers of cities as fully and completely as though those powers and immunities were specifically enumerated in and provided for in this charter. In no case shall any enumeration of particular powers or immunities in this charter be held to be exclusive.