The Employment Standard under the AODA states that all public sector organizations, and private or non-profit organizations with fifty or more workers, must develop and document a process for writing return to work plans.

Return to work plans are written documents that provide support for workers who have been absent from work because of a disability and who need disability-related accommodations when they return to work. Workers can have return to work plans if their illness or injury is not covered by the return to work process under a different law, such as the Workplace Safety and Insurance Board (WSIB).

Read more at
https://aoda.ca/return-to-work-plans-for-ontario-workplaces/