(a) Any agent or attorney of any state having in effect a plan approved under federal law, who has the duty or authority under such plan to seek to recover any amounts owed as child and spousal support (including, when authorized under the state plan, any official of a political subdivision);
(b) The court which has authority to issue an order or to serve as the initiating court in an action to seek an order against a noncustodial parent of the support and maintenance of a child, or any agent of such court;
(c) The resident parent, legal guardian, attorney or agent of a child (other than a child receiving federal assistance as determined by federal regulation) without regard to the existence of a court order against a noncustodial parent who has a duty to support and maintain any such child;
(d) A state agency that is administering a program operated under a state plan approved under federal law;
(e) Any agent or attorney of any state having an agreement under this section, who has the duty or authority under the law of such state to enforce a child custody or visitation determination;
(f) Any court having jurisdiction to make or enforce such a child custody or visitation determination, or any agent of such court; and
(g) Any agent or attorney of the United States, or of a state having an agreement under this section, who has the duty or authority to investigate, enforce or bring a prosecution with respect to the unlawful taking or restraint of a child.