6 CFR § 13.47
Limitations
January 1, 2021
(a) The notice of hearing with respect to a Claim or Statement must be served in the manner specified in §13.8 within 6 years after the date on which such Claim or Statement is Made.
(b) If the Defendant fails to serve a timely answer, service of a notice under §13.10(b) will be deemed a notice of hearing for purposes of this section.
(c) The statute of limitations may be extended by agreement of the parties.