It is important to address student accessibility issues at the start of the semester so that the process of determining and implementing accommodation can be met in time for when the assessment is given.
An example to ask students directly about accessibility is as follows: If there is anyone who requires accessibility accommodations for assessments in this course, please contact me through my email. Any accommodations will be made confidentially and coordinated through the Accessibility Services department.
For TRU, here is information from the Accessibility Services department. There are also clear advice and instructions for faculty to address a wide variety of situations and accommodation issues.