Weapons: firearms; possessing or carrying a firearm while having a certain level of tetrahydrocannabinol in blood; allow prohibition. Amends secs. 4 & 15 of 2018 IL 1 (MCL 333.27954 & 333.27965).  TIE BAR WITH: HB 4501'19 , HB 4502'19 , HB 4504'19