This is an Indiana law now. passed both legislative branches and signed by governor pence . Here is the "bill" form in pdf http://in.proxy.openstates.org/.../versions/hb1432.03.engh
Sec. 15."Manufacturer"means a personor cooperative,located inside or outside Indiana, that is engaged in manufacturing e-liquid.
Sec. 16. "Manufacturing" means the process by which an e-liquid is mixed, bottled, packaged, and stored.
That could be construed to mean a DIY type. Even though the rest of the law clearly is aimed at a commercial operation, this could be taken to mean DIY. It's like they ignored the possibility of folks making their own