If you wish to compete in any MSO sanctioned meet you need to be registered with Masters Swimming Ontario (MSO), i.e. you need to have a current MSO number. 2016/2017 MSO registration expired on August 31, 2017.
You can renew your MSO registration for 2017/2018 (through August 2018) or sign up for an MSO number for the first time by filling out and submitting the form before the end of the day on Friday, October 13, 2017. The form requires a password which is circulated by e-mail.
The new MSO numbers will be mailed out individually later in October.