California Child Support Guideline Review
Each U.S. state is responsible for developing a child support enforcement program that complies with federal requirements, including a guidelines method of calculating child support. At minimum, 45 C.F.R. 302.56 requires each state to establish and publish a guideline that is presumptively (but rebuttably) correct, and review the guideline, at a minimum, every four years.
Source: Wikipedia — California Child Support Guideline Review (CC BY-SA 4.0)