§ 274. Extension of the district. A county district may be extended so
as to include territory not previously included within its boundaries in
the same manner as hereinbefore prescribed for the original
establishment of the district. If the cost of establishment of the
original district and of providing the improvement therein was assessed,
levied and collected pursuant to the provisions of section two hundred
seventy, then the cost of the extension and of the improvements therein
shall be assessed, levied and collected pursuant to the provisions of
said section. If the cost of establishment of the original district and
of providing of the improvement therein was assessed, levied and
collected pursuant to the provisions of section two hundred seventy-one,
then the cost of the extension and of the improvement therein shall be
assessed, levied and collected pursuant to the provisions of said
section. The cost of the extension shall include such proportion of the
cost of the system of the original district as the board of supervisors
shall determine.