(1)Notice of objections or motion to quash. A participant, or a recipient of a subpoena, who does not intend to comply with a discovery request must notify in writing the participant seeking discovery within a reasonable time in advance of the date on which a response or other action in conformance with the discovery request is due. A recipient of a subpoena may either provide a notice of objection or file a motion to quash.
https://www.law.cornell.edu/cfr/text/18/385.410