Connecticut General Statutes Title 46B. Family Law § 46b-115m. Modification of custody determination of another state

(a) Except as otherwise provided in section 46b-115n, a court of this state may not modify a child custody determination made by a court of another state unless a court of this state has jurisdiction to make an initial determination under subdivisions (1) to (4), inclusive, of subsection (a) of section 46b-115k and one of the following occurs: (1) The court of the other state determines that it no longer has exclusive, continuing jurisdiction under a provision substantially similar to section 46b-115l; (2) a court of another state determines that a court of this state would be a more convenient forum under a provision substantially similar to section 46b-115q; or (3) a court of this state or another state determines that the child, the child's parents and any person acting as a parent do not presently reside in the other state.

(b) Notwithstanding the provisions of this chapter, a court of this state may modify a child custody determination made by a court of another state if: (1) The child resides in this state with a parent; (2) the child has been, or is under a threat of being, abused or mistreated by a person who resides in the state which would have jurisdiction under the provisions of this chapter; and (3) the court of this state determines that it is in the child's best interest to modify the child custody determination.