Speak up and Lobby to Change a Law. Find out who to speak to about the law you want to change. You'll need to know if the law was passed at the municipal, state or federal level. Your town or city council office should be able to tell you when and where the law was passed.Make a list of each person you want to lobby to have the law changed.Remember, even if it is just a municipal law, you may want to speak with state and federal congressional members. The support of a member of Congress can help further your cause.Find out if this law will be discussed at any upcoming meetings.peak up and Lobby to Change a Law. Find out who to speak to about the law you want to change. You'll need to know if the law was passed at the municipal, state or federal level. Your town or city council office should be able to tell you when and where the law was passed.