This bill, titled "Harbors and Harbor Lines," seeks to amend Chapter 46-4 of the General Laws by adding a new section that allows towns and cities to regulate houseboats within their jurisdiction. The bill defines a houseboat as a building constructed on a float, raft, or barge that is used for habitation or as a place of business. It includes platforms, waterborne hotels, and restaurants. The bill also allows towns and cities to impose penalties for violations, with a maximum penalty of $750 per day for the first seven days and $1,000 per day thereafter. The bill would take effect upon passage.