C.R.S. § 14-13-301

As used in this part 3, unless the context otherwise requires: (1) “Petitioner” means a person who seeks enforcement of an order for the return of a child under the “Hague Convention on the Civil Aspects of International Child Abduction” or enforcement of a child-custody determination. (2) “Respondent” means a person against whom a proceeding has been commenced for enforcement of an order for the return of a child under the “Hague Convention on the Civil Aspects of International Child Abduction” or enforcement of a child-custody determination.