The Oklahoma Department of Human Services, through its Child Support Enforcement Division (CSED), opens, or initiates, and closes child support enforcement cases to provide appropriate IV-D services.  In initiating and closing cases, CSED is governed by Sections 302.33, 303.2, and 303.11 of Title 45 of the Code of Federal Regulations; Title IV, Part D, of Subchapter IV of Chapter 7 of Title 42 of the United States Code; and Section 237 of Title 56 of the Oklahoma Statutes.