The first ruling, entitled Barrel Profiles in Single Stack Division, enforces the board mandated change to Single Stack Division requiring all barrels, regardless of outside diameter, to have a bushing, unless the barrel is shorter than 4.20 inches. Here is the text of that ruling:Per BOD directive, all barrels must have a bushing installed, regardless of barrel diameter. Cone and flanged barrels are not allowed. This does not apply to pistols having a barrel length of 4.20 inches or less. All other parameters for Single Stack, including the weight limit, remain in effect.
"Coned barrels, bull barrels, or barrels with flanges, except in 1911 compact pistols with a barrel length of 4.20 inches or less. (Note: All other barrels must have barrel bushings and conform to factory profile)."