These links will take you to the informed consent and assumption of risk agreement forms.
Athletes and Coaches 18 and over: http://www.saskathletics.ca/images/pdfs/RELEASE_OF_LIABILITY.pdf
Pleasel fill them out and send them to email@example.com by email if possible. You can either scan it or take a picture of the form and send it to him. This is a onetime form submission, but they need to be done right away since they are REQUIRED before you can start practice.