The city of Marco Island issued special assessment revenue bonds to pay for a sewer and wastewater treatment project. The trial court validated the bond issue and Citizens Advocating Responsible Environmental Solutions appealed that ruling to this Court. They argue the city has unfairly levied assessments to fund the bonds on new users of the wastewater treatment facility alone and that existing users should bear some of the cost. The city argues that new users are being assessed only for expansion of the wastewater treatment facility, not upgrades to the system.