45 CFR 303.4 - Establishment of support obligations.
(a) When necessary, establish paternity pursuant to the standards of § 303.5;
(c) Periodically review and adjust child support orders, as appropriate, in accordance with § 303.8.
(d) Within 90 calendar days of locating the alleged father or noncustodial parent, regardless of whether paternity has been established, establish an order for support or complete service of process necessary to commence proceedings to establish a support order and, if necessary, paternity (or document unsuccessful attempts to serve process, in accordance with the State's guidelines defining diligent efforts under § 303.3(c)).
(e) If the court or administrative authority dismisses a petition for a support order without prejudice, the IV-D agency must, at the time of dismissal, examine the reasons for dismissal and determine when it would be appropriate to seek an order in the future, and seek a support order at that time.
(f) Seek a support order based on a voluntary acknowledgment in accordance with § 302.70(a)(5)(vii).