(1) All tariffs and supplements thereto must be in book, pamphlet or loose leaf form and printed or typed on hard calendered paper with not smaller than 8 point type, except that 6 point bold face type may be used for reference marks and except as provided in WAC 480-149-030 (1)(b).

(2) The size must be 8 by 11 inches or 8-1/2 by 11 inches except railroad local passenger tariffs which may be 4 by 9 inches.

(3) A margin of not less than five-eighths of an inch must be left for binding.