To change a law, start by doing some research, finding the right level of government to approach, and looking into pending legislation. You might be able to write a draft of the law yourself, or you might need the support of your state or national legislator.Itâs a lot easier to change local or state law than on the federal level, but there are possibilities for taking action at any level.mail is probably going to be the best way to do this. Their email address is going to be on their website -- all state representatives would have this. Explain to them that you are a constituent interested in trying to change or pass a law. Send them an example of the text of the law you think you want to create.