It’s on the partner hub. You will have to log in, and search “partner guide”. Directly from the Canadian manual:

“If a partner cannot report to work as scheduled or if the partner will be late to work, it is the partner’s responsibility to directly notify the store manager or assistant store manager. If a manager is not in the store, the partner should notify the partner leading the shift. Leaving a message without first making reasonable attempts to directly contact a manager or the partner leading the shift is not acceptable. Sending an email or text messaging is not an acceptable form of providing notice.

Responsibility for Finding a Substitute: If a partner knows in advance that he or she will be unable to report to work for a scheduled shift, it is the partner’s responsibility to notify the store manager or assistant store manager in advance and for the partner to arrange for another partner to substitute.

In the event of an unplanned absence (e.g. the onset of illness, injury or emergency), the partner will not be held responsible for finding a substitute. The partner is still responsible for notifying the manager (or the partner leading the shift if the manager is not in the store) of the absence prior to the beginning of the shift so coverage can be arranged if needed.”