Hali jigs are perfectly legal to use in MA!
According to Mass Wildlife, the definition of a jig is a lead weighted hook. Or other words, the lead is molded onto the hook. A "Hali jig" would be considered a lure since the hook is attached to the jig via either a chain or split ring. I have talked to a few different EPO's regarding this when the law first came out and that is what they have told me.