{"data":{"id":"us-ca/fam-3423","jurisdiction":"us-ca","citation":"FAM § 3423","heading":"","body":"Except as otherwise provided in Section 3424, 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 paragraph (1) or (2) of subdivision (a) of Section 3421 and either of the following determinations is made:\n(a) The court of the other state determines it no longer has exclusive, continuing jurisdiction under Section 3422 or that a court of this state would be a more convenient forum under Section 3427.\n(b) A court of this state or a court of the other state determines that the child, the child’s parents, and any person acting as a parent do not presently reside in the other state.","path":["Family Code - FAM","DIVISION 8. CUSTODY OF CHILDREN [3000. - 3465.]","PART 3. UNIFORM CHILD CUSTODY JURISDICTION AND ENFORCEMENT ACT [3400. - 3465.]","CHAPTER 2. Jurisdiction [3421. - 3430.]"],"source_url":"https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zip","current_through":"2026-09-13","vintage":"","retrieved_at":"2026-09-14T05:56:33Z","sha256":"10411e9afb417331e4432800aac42af4f54bdeb88fb14dec2f951b320c124206","source_id":"us-ca","stale":false,"prev":"us-ca/fam-3422","next":"us-ca/fam-3424"},"notice":"GroundRules: Original legal text. Not legal advice."}