A deposition taken without leave of court pursuant to a notice under Rule 30(b) (2) shall not be used against a party who demonstrates that, when served with the notice, it was unable through the exercise of diligence to obtain counsel to represent it at the taking of the deposition; nor shall a deposition be used against a party who, having received less than 11 days notice of a deposition, has promptly upon receiving such notice filed a motion for a protective order under Rule 26(c) (2) requesting that the deposition not be held or be held at a different time or place and such motion is pending at the time the deposition is held.
Substitution of parties pursuant to Rule 25 does not affect the right to use depositions previously taken; and, when an action has been brought in any court of the United States or of any state and another action involving the same subject matter is afterward brought between the same parties or their representatives or successors in interest, all depositions lawfully taken and duly filed in the former action may be used in the latter as if originally taken therefor. A deposition previously taken may also be used as permitted by the Delaware Uniform Rules of Evidence.
Del. R. Civ. P. Super. Ct. 32