Section 385.507 - Prepared written testimony (Rule 507)(a)Offered as an exhibit. The prepared written testimony of any witness must be offered as an exhibit. The presiding officer will allow a reasonable period of time for the preparation of such written testimony.(b)Time for filing. Any prepared written testimony must be filed and served within the time provided by the presiding officer, in no case later than 10 days before the session of the hearing at which such exhibit is offered, unless a shorter period is permitted under paragraph (c) of this section.(c)Late-filed testimony.(1) If all participants in attendance at the hearing agree, the 10-day requirement for filing any written testimony under paragraph (b) of this section is waived.(2) The presiding officer may permit the introduction of any prepared written testimony without compliance with paragraph (b) of this section, if the presiding officer determines that the introduction of the testimony:(i) Is necessary for a full disclosure of the facts or is warranted by any other showing of good cause; and(ii) Would not be unduly prejudicial to any participant.(3) If any written testimony is served and filed within the 10 day period provided in paragraph (b) of this section, the presiding officer will provide the participants in attendance with a reasonable opportunity to inspect the testimony.(d)Form; authentication. Prepared written testimony must have line numbers inserted in the left-hand margin of each page and must be authenticated by an affidavit of the witness.