§ 119-m. Legislative intent. The provisions of this article are
designed to effectuate in part (1) section two-a of article eight of the
constitution and (2) section one of article eight of the constitution as
amended January first, nineteen hundred sixty, and shall be in addition
to and not in substitution for or in limitation of any other
authorization for performance by municipal corporations or districts of
their functions, powers or duties on a cooperative, joint or contract
basis.