Federal Rules of Civil Procedure

Unless the court orders otherwise, the parties may stipulate that:

(a) a deposition may be taken before any person, at any time or place, on any notice, and in the manner specified — in which event it may be used in the same way as any other deposition; and

(b) other procedures governing or limiting discovery be modified — but a stipulation extending the time for any form of discovery must have court approval if it would interfere with the time set for completing discovery, for hearing a motion, or for trial.