42 CFR §498.103

1. (a)Notice. The notice mailed to the parties states the basis or reason for the revised decision and informs them of their right to Departmental Appeals Board review of an ALJ revised decision, or to judicial review of a Board reviewed decision.
2. (b)Effect—(1) ALJ revised decision. An ALJ revised decision is binding unless it is reviewed by the Departmental Appeals Board.
   1. (2)Departmental Appeals Board revised decision. A Board revised decision is binding unless a party files a civil action in a district court of the United States within the time frames specified in § 498.95.