Any member of either house, with the agreement of the author of a bill, may add his or her name on that member's bill as coauthor, usually indicating support for the proposal
A member of either house whose name is added to a bill as a coauthor by amending the bill, usually indicating support for the proposal
A legislator authorized by the primary author to join in the authorship of a bill or resolution A coauthor must be a member of the chamber in which the bill was filed