Except as otherwise specifically provided for
by General or Special Law or Town bylaw, the due date for the payment
of any municipal charge or bill shall be 30 days from the date of
issuance of such charge or bill, and interest at the rate of fourteen
percent (14%) per annum, computed from the due date, shall accrue
thereon if such charge or bill remains unpaid after such due date;
provided, however, that the rate of interest shall not exceed the
rate at which interest may be charged on tax bill under the provisions
of MGL c. 59, § 57.