No testimony or evidence shall be given or received at any hearing concerning transactions had or statements or communications made during the conduct or course of any conference called and held concerning charges or petitions unless at the hearing all parties shall expressly waive this provision. This provision shall not apply to the giving or receipt of evidence concerning a consent comparison pursuant to section 251.10 of this Title.
N.Y. Comp. Codes R. & Regs. Tit. 12 § 253.20