New york constitution
Article IX: local governments
Section 1

(2) After the adoption of an alternative form of county government by a county, any amendment thereof by act of the legislature or by local law which abolishes or creates an elective county office, changes the voting or veto power of or the method of removing an elective county officer during his or her term of office, abolishes, curtails or transfers to another county officer or agency any power of an elective county officer or changes the form or composition of the county legislative body shall be subject to a permissive referendum as provided by the legislature. (Amended by vote of the people November 6, 2001.)