"The tax may be paid in _________ installments, the first installment of _________ percent on or before the _________ day of ___________________ A.D. 20 _________ : (proportions and dates to be specified.)"
"Each installment of taxes if paid on or before the last day of each installment period successively and in order is free from any interest charge."
"If the first installment or any succeeding installment of taxes is not paid by the last date of the respective installment period or periods as they occur, then the whole tax or remaining unpaid balance of the tax, as the case may be, immediately becomes due and payable and carries until collected a penalty at the rate of _________ percent (not less than six (6) nor more than eighteen (18) or, in the case of the city of Cranston, not more than twelve (12) per annum)."
R.I. Gen. Laws § 44-5-8