167.21 Reciprocal agreements with other states. The department is authorized to enter into reciprocal agreements in behalf of this state with any one or more of the states adjacent to this state, providing for permits to be issued to rendering plants located in either state to transport carcasses to their plants over public highways of this state and the reciprocating state. [C62, 66, 71, 73, 75, 77, 79, 81, §167.21]
Iowa Legal Code