Although the filing office maintains regular office hours (8:45 A.M. to 5:00 P.M., Monday through Friday, except holidays), it receives transmissions electronically and by facsimile 24 hours per day, 365 days per year, except for scheduled maintenance and unscheduled interruptions of service. Electronic communications may be retrieved and processed periodically (but no less often than once each day the filing office is open for business).
950 CMR, § 140.05