In Mississippi this is legal as long as you only use 1 jig with the trailer for a Total of 2 hooks. It IS illegal to use this with 2 jigs on your line. That gives you 3 or 4 hooks on the line depending on whether you put a trailer on the second jig. That the answer from the MDWFP. In a state with NO hook limit per line, it's legal to use the trailer on ALL baits.

A crank bait would be considered a single bait because it hasn't been modified by the user. It would be legal in Sippi to pull 2 cranks on one pole, or even a crank with a jig trailer.