In South Carolina, there are handicap placards and handicap plates. Both have different processes like showing your 100% letter, while some overlap, such as having a physician's signature to get them.
Information for placards:
Here is where the description goes
www.scdmvonline.com
Information for DV plates (the Application for Military Plates (SCDMV Form MV-37) lists the requirements):
Plates or tags for Military customers
www.scdmvonline.com