When a requirement is sent for review, a requirement owner or co-owner can add a date for which they request the reviewer's to provide their response. A date can be added, in the confirmation window, when a requirement is sent for review.
Alternatively, an owner can add a date to the Review Due field of the details window once it has been sent for review. A date can also be added in the Reviewers tab by using the Click here to request the review by a certain date function. When the text is clicked a calendar will appear and a date can be selected.
Users will need to be the requirement owner or co-owner, and have project permissions to view and edit the requirement to perform this action.