Rules here.

ALL TEAMS ARE COED.
Eligibility/Age
IISC  uses calendar years.  All age groups are calendar year.

7-8-9-10 year olds are born in 2017-2016-2015-2014

11-12-13 year olds are born 2013-2012-2011

14-15-16 year olds are born in 2010-2009-2008

3. Age Group, Game Length

The Under 10 teams play 7v7: roster size 12, 20 minute halves
The Under 13 teams play 9v9: roster size 14, 20 minute halves
The Under 16 teams play 11v11: roster size 18, 25 minute halves