3 model matches closed 2-5 days after effective date but before your signature date/date wrote report.
If engagement letter forced you to use only closed sales before effective date, you would need to decline the assignment as you cannot produce credible results.
If you continue with this assignment and follow this bankers rules, your appraisal would not be credible.
Again, the 1 second in time, where the world stops, is for the subject only and its market conditions. The 1 second time stop is to value the subject with all relevant data before and after this 1 second time stop.