37 C.F.R. § 2.115 Amendment of pleadings in a cancellation proceeding.
Title 37 - Patents, Trademarks, and Copyrights
Pleadings in a cancellation proceeding may be amended in the same manner and to the same extent as in a civil action in a United States district court. [48 FR 23136, May 23, 1983]
Title 37: Patents, Trademarks, and Copyrights
PART 2—RULES OF PRACTICE IN TRADEMARK CASES
Cancellation
§ 2.115 Amendment of pleadings in a cancellation proceeding.

