A.
Whenever the Director of Public Works shall make any assessment of benefits under the provisions of No. 268 of the Special Acts of 1921 or any amendment of or substitute for No. 268 of the Special Acts of 1921, he shall provide for the payment of any assessment in such number of substantially equal annual installments, not exceeding 10, as he shall determine and shall provide for interest charges on any deferred payments at such rate of interest as shall be set by the Board of Finance. Any person who may have elected to pay his assessment in more than one installment may make payment at any time in full of the whole or such part of such assessment as still remains unpaid.
B.
Any such installment of an assessment not paid within 30 days of the due date shall thereupon be delinquent and shall be subject to interest from the due date at the same interest rate and in the same manner as provided by the Connecticut General Statutes in the case of delinquent taxes. Interest shall be computed on the entire unpaid balance of the assessment from the due date of the last installment which was paid or from the due date of the assessment if no previous installment has been paid. Each addition of interest shall become and be collectible as a part of such assessment. Whenever any installment of an assessment becomes delinquent, any remaining unpaid installments of such assessment shall also become delinquent, provided that if all past due installments, together with interest and any other charges, have been paid in full, remaining installments may be paid without additional penalty, except for subsequent default, in accordance with the original installment schedule.