620 ILCS 5/14

"Air school" means any person engaged in giving, or offering to give, instruction, in aeronautics, either in flying or ground subjects, or both, for or without hire or reward, and advertising, representing, or holding himself out as giving or offering to give such instruction. It does not include any public school or university of this State, or any institution of higher learning duly accredited and approved for carrying on collegiate work.