From the Book of War
1.3.1 All striking surfaces of Weapons must be padded adequately to prevent personal injury when striking an opponent with full force on that surface.
1.3.3 Two and one-half inch rule—No surface on a striking edge (sword tip, arrow head, spear head, javelin head, etc.) whether designed for stabbing or not, may pass more than 0.5 inch through a 2.5 inch hole; swords with a semicircular tip, with a minimum 1.5 inch radius are exempt from this rule. See Appendix A, 1.4.4
1.3.6 All striking surfaces must have a cloth covering.
1.3.7 The amount of tape on a striking surface should be kept to a minimum.