Mason - Subject to local approval, revises the charter of the Town of Mason to provide grounds for vacating certain offices, to prescribe the oath for office; to fix the time, place, and notice requirements for meetings of the board of mayor and aldermen, to establish the rules of procedure for meetings, to prescribe additional duties of the mayor and the board, to provide for the administration of government and personnel, to prescribe the duties of the town administrator and town attorney, to prescribe the budget process, and to make various other changes. - Amends Chapter 120 of the Private Acts of 1915; as amended and rewritten.