Here are the archived documents. It includes previous years constitution and rulebook as well as meeting minutes
It is broken down by the relevant year.
2017-2018
Captains Meeting Minutes – 25th November 2017
Captains Meeting Minutes – 24th March 2018
2016-2017
ISAA Constitution Revision 12-Mar-16 OLD
ISAA Rulebook Revision 12-Mar-16 OLD
2012-2013
ISAA Constitution 2012-2013 OLD
ISAA League rules 2012-2013 OLD