An airplane license shall be maintained at the licensee's business premises in Illinois.
235 ILCS 5/6-24
Every licensee shall cause his license or licenses to be framed and hung in plain view in a conspicuous place on the licensed premises
P.A. 82-783.
Official source: Illinois General Assembly. Reproduced from public-domain Illinois statutes; confirm against the official source for the current text. Not legal advice.