I feel like I see this question or related questions a lot on here. Here is the standard from our handbook (pg. 29)

“Responsibility for Finding a Substitute: Planned time off, such as for a vacation day,
must be approved in advance by the manager. If a partner will be unable to report to
work for a scheduled shift and knows in advance, it is the partner's responsibility to
notify the store manager or assistant store manager and for the partner to arrange
for another partner to substitute.
In the event of an unplanned absence, e.g., the sudden onset of illness, injury or
emergency, or when the partner is using paid sick leave allowable by law, the partner
will not be held responsible for finding a substitute. The partner is still responsible for
notifying the store manager or assistant store manager (or 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.
Failure to abide by this policy may result in corrective action, up to and including
separation from employment. Some examples of failure to follow this policy include
irregular attendance, one or more instances of failing to provide advance notice of
an absence or late arrival, or one or more instances of tardiness.”