The regulations, limitations, restrictions and provisions
of this chapter may be amended, changed, modified or repealed and
the boundaries of any district may be changed by ordinance, but no
amendment or change shall become effective unless the ordinance proposing
such amendment or change shall first have been submitted to the Planning
Board for approval, disapproval or suggestions and the Planning Board
shall have a reasonable time, not less than 30 days, for consideration
and report, and in the case of an unfavorable report by the Planning
Board, such amendment shall not become effective except by a favorable
vote of two-thirds (2/3) of the governing body of the municipality.