(1-1) "Administration" means the Child Support Enforcement Administration of the Department of Human Resources.
(3-1) "Cash medical support" means an amount paid:
(29-1) "Reasonable in cost" means the cost of cash medical support, the cost of adding the child to existing health insurance coverage, or the difference between self-only and family coverage, ordered in an amount not to exceed 5 percent of the actual income of the parent.
Md. Code Regs. 07.07.01.02