Rule 12.3 - Notice of defense based upon public authority(a) Notice by defendant; state response; disclosure of witnesses.(1) Defendant's notice and state's response. - A defendant intending to claim a defense of actual or believed exercise of public authority on behalf of a law enforcement or federal intelligence agency at the time of the alleged offense shall, within the time provided for the filing of pretrial motions or at such later time as the court may direct, serve upon the attorney general a written notice of such intention and file a copy of such notice with the prothonotary. Such notice shall identify the law enforcement or federal intelligence agency and any member of such agency on behalf of which and the period of time in which the defendant claims the actual or believed exercise of public authority occurred. If the notice identifies a federal intelligence agency, the copy filed with the prothonotary shall be under seal. Within ten days after receiving the defendant's notice, but in no event less than twenty days before the trial, the attorney general shall serve upon the defendant or the defendant's attorney a written response which shall admit or deny that the defendant exercised the public authority identified in the defendant's notice.(2) Disclosure of witnesses. - At the time that the state serves its response to the notice or thereafter, but in no event less than twenty days before the trial, the attorney general may serve upon the defendant or the defendant's attorney a written demand for the names and addresses of the witnesses, if any, upon whom the defendant intends to rely in establishing the defense identified in the notice. Within seven days after receiving the state's demand, the defendant shall serve upon the attorney general a written statement of the names and addresses of any such witnesses. Within seven days after receiving the defendant's written statement, the attorney general shall serve upon the defendant or the defendant's attorney a written statement of the names and addresses of the witnesses, if any, upon whom the state intends to rely in opposing the defense identified in the notice.(3) Additional time. If good cause is shown, the court may allow a party additional time to comply with any obligation imposed by this rule.(b) Continuing duty to disclose. - If, prior to or during trial, a party learns of any additional witness whose identity, if known, should have been included in the written statement furnished under subdivision (a) (2) of this rule, that party shall promptly notify in writing the other party or the other party's attorney of the name and address of any such witness.(c) Failure to comply. - If a party fails to comply with the requirements of this rule, the court may exclude the testimony of any undisclosed witness offered in support of or in opposition to the defense, or enter such other order as it deems just under the circumstances. This rule shall not limit the right of the defendant to testify.(d) Protective procedures unaffected. - This rule shall be in addition to and shall not supersede the authority of the court to issue appropriate protective orders, or the authority of the court to order that any pleading be filed under seal.(e) Inadmissibility of withdrawn defense based upon public authority. - Evidence of an intention as to which notice was given under subdivision (a) , later withdrawn, is not, in any civil or criminal proceeding, admissible against the person who gave notice of the intention.De. R. Crim. P. Super. Ct. 12.3