20 CFR §401.50

1. (a)General. Subject to the provisions governing medical records in § 401.55 and the provisions governing exempt systems in § 401.85, upon receipt of your request for notification of or access to a record and verification of your identity, we will review your request and grant notification or access to a record, if you are the subject of the record.
2. (b)Our delay in responding. If we determine that we will have to delay responding to your request because of the number of requests we are processing, a breakdown of equipment, shortage of personnel, storage of records in other locations, etc., we will so inform you and tell you when notification or access will be granted.