906.7  Information from other sources — written statements.
  The board shall not be required to hear oral statements or arguments either by attorneys or other persons. All persons presenting information or arguments to the board shall put their statements in writing, and shall submit therewith an affidavit stating whether any fee has been paid or is to be paid for their services in the case, and by whom such fee is paid or to be paid.
[C79, 81, §906.7]