Use tax: exemptions; motor and aviation fuel sales; exempt. Amends secs. 6c & 21 of 1937 PA 94 (MCL 205.96c & 205.111) & adds secs. 4gg & 4ii.  TIE BAR WITH: HB 5582'20 , HB 5584'20 , HB 5585'20 , HB 5586'20