How many rules changes can be implemented at the same time?
Significant changes will only be implemented after extensive trial and a period of mandatory experiment. Hockey Rules Board experience suggests that monitoring the effectiveness of significant rule change(s) is best done when only one change is implemented at any one time – so it tries to operate in this way whenever possible. Other amendments to the rules are essentially of a minor nature and will not affect the conduct of the game to any great extent and so a few are sometimes implemented at the same time.
