There are several playing rule changes for the 2017/18 Senior competition, 

Playing condition 21  -  Blood Rule  becomes Blood Rule / Concussion Policy 

Playing Condition Rule 43 – Playoff Conditions – Change Division 3 and Division 3 Reserves finals to 2 week final series

Playing Condition Rule 46 – Baseball Bats – Change all Senior Divisions to Wood Bat

Playing Condition Rule 98 – Non-National Players – Add registration date to Non National Rule, remove extenuating circumstances

These changes will be voted on by clubs so let a committee member know if you feel strongly about any of the above changes.

Rule change details here