The provisions of this article granting reemployment rights to members of the South Carolina National Guard and to members of the South Carolina State Guard who, at the discretion of the Governor or by his authority, enter state duty and are honorably released from that duty shall apply also to a person who is employed in South Carolina but is a member of another state’s national or state guard who, at the discretion of the other state’s Governor or by his authority, enters into state duty and is honorably released from that duty.