Every Person who shall be registered under the Provisions of this Act shall be exempt, if he shall so desire, from serving on all Juries and Inquests whatsoever, and from serving all corporate, parochial, Ward, Hundred, and Township Offices, and from serving, in the Militia, and the Name of such Person shall not be returned in any List of Persons liable to serve in the Militia, or in any such Office as aforesaid.