From the article:
Sec. 2.5. "Automatic weapon" or "semiautomatic weapon" means a weapon that shoots, is designed to shoot, or can be readily restored to shoot automatically more than one (1) shot, without manual reloading, by a single function of the trigger.The Indiana legislators don't even recognize a difference between automatic and semi-autos. As long as this definition remains in the legislation, it won't criminalize true semi-autos, the problem is that in the future this definition could mysteriously vanish and the common definition of semi-autos would replace it.
Looks like the author was trying to craft a "Scary-Looking Gun" ban and couldn't get the language straight...