42 CFR § 405.1807
Effect of contractor determination
June 11, 2020
The determination shall be final and binding on the party or parties to such determination unless:
(a) A contractor hearing is requested in accordance with §405.1811 and a contractor hearing decision rendered in accordance with §405.1831; or
(b) The contractor determination is revised in accordance with §405.1885; or
(c) A Board hearing is requested in accordance with §405.1835 and a hearing decision rendered pursuant thereto.