if the rules is adopted, then who is going to be paying for the plug & drills on all the older equipment once the grandfathering has expiried.
After all l still use a couple of balls that would be older than 3 years old, as a matter of fact l have a ball l use that is 9 years old still. Still works fine, but has a weight hole.
I know l would not be paying for new equipment, because someone found a way to make all bowlers pay even more money to be in the sport.