The legislative body conducting the proceedings may provide for a classification of assessments into different terms of maturity so that some assessments may be made to mature over a shorter period of time than other assessments and may also provide for assessments to mature in other than equal annual amounts.
In such event, the bond declaration in the resolution of intention, assessment, and notice of recording the assessment may recite that the last installment of bonds shall mature a maximum rather than an exact number of years from the second day of January next succeeding the next September 1st following their date.