Conn. Gen. Stat. § 11-39: Municipal participation.

No town, city, borough or other political subdivision of this state shall be party to a library agreement which provides for the construction or maintenance of a library pursuant to article III, subdivision (c-7) of the compact, or pledge its credit in support of such a library, or contribute to the capital financing thereof, except after compliance with any laws applicable to such towns, cities, boroughs or political subdivisions relating to or governing capital outlays and the pledging of credit.