Section 309.20 - Who submits a Tribal IV-D program application and where?(a) The authorized representative of the Tribe or Tribal organization must sign and submit the Tribal IV-D program application.(b) Applications must be submitted to the Office of Child Support Enforcement, Attention: Federal Office of Child Support Enforcement, with a copy to the appropriate regional office. 69 FR 16672 , Mar. 30, 2004, as amended at 85 FR 35208 , June 9, 2020