Enactment has two different uses, so context matters. In law and government, an enactment is the act of officially making a bill into a law - when a law is 'enacted', it becomes real and enforceable, and 'enactment' is the noun for that whole process, or sometimes for the law itself. Separately, in theater or education, an 'enactment' can mean a performance where people act out a real event, like a historical battle, as if it were happening again.