Upon receipt of a request for amendment of a record, the Privacy Act Officer shall:
(a) Correct any portion of a record which the individual making the request believes is not accurate, relevant, timely, or complete and thereafter inform the individual in writing of such correction, or
(b) Inform the individual in writing of the refusal to amend the record and of the reasons therefor, and advise that the individual may appeal such determination as provided in § 1403.9.