(a) Information regarding the amount of arrearages owed by an obligor may be made available by the Office of Child Support to any consumer credit bureau organization upon the request of the organization, only if the amount of the arrearages is at least one-quarter of the annual support obligation and the Office of Child Support has notified the obligor by first-class mail or other means likely to give actual notice of the proposed action and given a period not to exceed 20 days to contest the accuracy of the information with the Office of Child Support. In computing the amount of an arrearage, any arrearage accumulated after a motion to modify has been filed shall not be included.
(b) The Office of Child Support shall immediately notify each credit bureau organization to which information has been furnished of any increases or decreases in the account balance.