Where an individual has reason to believe that personal data relating to him is held, but where the specific agency which holds such data is unknown to him, the individual may request, in writing, that the responsible person designated by the agency locate all personal data held in indexed personal data systems by agencies affected by 960 CMR 2.00. The responsible person shall make a reasonable effort to locate all such personal data and shall respond to such request within 20 days.
960 CMR, § 2.19