http://sca.org/officers/marshal/ann.html
Single Hand weapons: thrusting tips
VII. WEAPONS STANDARDS, Section B, page 13
Old Standard
5. When thrusting tips are used, they shall be at least the same diameter as the shaft of the weapon they are mounted on and have at least 1 1/4 inch (31.8 mm) of resilient material in front of the rigid tip of the weapon providing at least 1/2 inch (12.7 mm) of progressively resistant give across the face of the thrusting tip. (Note: Pressing with the thumb into the center of the thrusting tip is not an adequate test. The give must be across the entire face of the tip.).
New Standard
5. When thrusting tips are used, they shall be at least the same diameter as the shaft of the weapon they are mounted on and have at least 3/4 inch (19.1 mm) of resilient material in front of the rigid tip of the weapon providing at least 3/8 inch (9.53 mm) of progressively resistant give across the face of the thrusting tip. (Note: Pressing with the thumb into the center of the thrusting tip is not an adequate test. The give must be across the entire face of the tip.)
Rattan Two-handed weapons: thrusting tips
VII. WEAPONS STANDARDS, Section C, page 14
Old Standard
5. When thrusting tips are used, they shall be no less than 2 inches (50.8 mm) in diameter/cross-section and have 2 inches (50.8 mm) of resilient material in front of the rigid tip of the weapon, thereby providing progressively resistant give.
New Standard
5. (a) When thrusting tips are used on rattan weapons with greater length than 7.5', they shall be no less than 2 inches (50.8 mm) in diameter/cross-section and have 2 inches (50.8 mm) of resilient material in front of the rigid tip of the weapon, thereby providing progressively resistant give.
(b) When thrusting tips are used on rattan weapons with length less than or equal to 7.5', they shall be at least the same diameter as the shaft of the weapon they are mounted on and have 1.5 inches (38.1 mm) of resilient material in front of the rigid tip of the weapon, thereby providing progressively resistant give. (Note: Pressing with the thumb into the center of the thrusting tip is not an adequate test. The give must be across the entire face of the tip.)