Conn. Gen. Stat. § 10-35
Sec. 10-35. Notice of discontinuance of high school service to nonresidents. Cooperative arrangements and school building projects for school accommodations.
(b) Notwithstanding the provisions of subsection (a) of this section, boards of education which enter into a cooperative arrangement pursuant to section 10-158a for the purpose of a school building project for school accommodations for students residing within the school districts that are members of such cooperative arrangement, may enter into agreements to provide such school accommodations for a period of not less than twenty years.