All interested parties required to file evidence with the board for consideration in a claim scheduled for a hearing must file this evidence not later than 5 p.m. on date of hearing. The board will consider requests for delayed evidence filing from any interested party. The request must be filed with the board in writing no later than 5 p.m. on the date of hearing and it must include a statement of the facts showing good cause and necessity for the delay. If delayed evidence is filed by any party after permission has been granted by the board, copies of such evidence must be simultaneously furnished to the opposing party (1970) (Rev. 1975).