We have a need to prevent the entry/posting of hours to a task before the task start date. We keep time periods open for 12 weeks in the past, mainly to support contractual terms with contingent worker vendors. So for example, if a new task is closed and opened each week for 10 weeks, and I fail to submit a timesheet for 9 weeks, then on the 10th week I can submit all of the previous timesheets to the week 10 task, resetting my 10th week task start date to 10 weeks ago. Is there a way to prevent those previous timesheets from posting or to prevent the task from displaying on the timesheet? Thanks for your replies.