Every member of the National Guard of South Carolina who shall be wounded or disabled while on duty in the service of the State or while reasonably proceeding to or returning from such duty shall be taken care of and provided for at the expense of the State, and, if permanently disabled, shall receive the like pensions or rewards that persons under similar circumstances in the military service of the United States receive from the United States. But no pension shall be granted by the State for any disability received while in the service of the United States or while proceeding to or returning from such service. Before the name of any person is placed on the pension roll under this section proof shall be made, under such regulations as the Governor may from time to time prescribe, that the applicant is entitled to such pension.