Rhode island constitution
Article XIII: home rule for cities and towns
Section 8

The legislative body of any city or town may propose amendments to a charter which amendments shall be submitted for approval in the same manner as provided in this article for the adoption of a charter except that the same may be submitted at a special election, and provided further that in the case of a town, amendments concerning a proposition to impose a tax or for the expenditure of money, shall be submitted at a special or regular financial town meeting.