(a) "Inoperative vehicle" means a motor vehicle which is not a junk vehicle but which lacks or has an inoperative engine, transmission or other mechanical part which results in said vehicle being unusable for transportation of persons.
(b) "Junk vehicle" means a former motor vehicle which is so dismantled, destroyed or changed that it physically is no longer a motor vehicle or is not the motor vehicle described in the purchaser's certificate of title.
(c) "Unlicensed vehicle" means a motor vehicle which does not display a current motor vehicle license on the front and rear thereof or a current validation sticker on the rear thereof.
(1969 Code 70.01)