(2) reimbursement of support;
         (3) payment or reimbursement of the expenses of

        (4) enrollment in a health insurance plan that is

    (b) “Arrearage” means the total amount of unpaid support obligations, including interest, as determined by the court and incorporated into an order for support.
     (b-5) “Business day” means a day on which State offices are open for regular business.
     (c) “Delinquency” means any payment, including a payment of interest, under an order for support which becomes due and remains unpaid after entry of the order for support.
     (d) “Income” means any form of periodic payment to an individual, regardless of source, including, but not limited to: wages, salary, commission, compensation as an independent contractor, workers’ compensation, disability, annuity, pension, and retirement benefits, lottery prize awards, insurance proceeds, vacation pay, bonuses, profit-sharing payments, severance pay, interest, and any other payments, made by any person, private entity, federal or state government, any unit of local government, school district or any entity created by Public Act; however, “income” excludes:
         (1) any amounts required by law to be withheld, other

        (2) union dues;
         (3) any amounts exempted by the federal Consumer

        (4) public assistance payments; and
         (5) unemployment insurance benefits except as

    Any other State or local laws which limit or exempt income or the amount or percentage of income that can be withheld shall not apply.
     (e) “Obligor” means the individual who owes a duty to make payments under an order for support.
     (f) “Obligee” means the individual to whom a duty of support is owed or the individual’s legal representative.
     (g) “Payor” means any payor of income to an obligor.
     (h) “Public office” means any elected official or any State or local agency which is or may become responsible by law for enforcement of, or which is or may become authorized to enforce, an order for support, including, but not limited to: the Attorney General, the Illinois Department of Healthcare and Family Services, the Illinois Department of Human Services, the Illinois Department of Children and Family Services, and the various State’s Attorneys, Clerks of the Circuit Court and supervisors of general assistance.
     (i) “Premium” means the dollar amount for which the obligor is liable to his employer or labor union or trade union and which must be paid to enroll or maintain a child in a health insurance plan that is available to the obligor through an employer or labor union or trade union.
     (j) “State Disbursement Unit” means the unit established to collect and disburse support payments in accordance with the provisions of § 10-26 of the Illinois Public Aid Code.
     (k) “Title IV-D Agency” means the agency of this State charged by law with the duty to administer the child support enforcement program established under Title IV, Part D of the Social Security Act and Article X of the Illinois Public Aid Code.
     (l) “Title IV-D case” means a case in which an obligee or obligor is receiving child support enforcement services under Title IV, Part D of the Social Security Act and Article X of the Illinois Public Aid Code.
     (m) “National Medical Support Notice” means the notice required for enforcement of orders for support providing for health insurance coverage of a child under Title IV, Part D of the Social Security Act, the Employee Retirement Income Security Act of 1974, and federal regulations promulgated under those Acts.
     (n) “Employer” means a payor or labor union or trade union with an employee group health insurance plan and, for purposes of the National Medical Support Notice, also includes but is not limited to:
         (1) any State or local governmental agency with a

        (2) any payor with a group health plan or “church