(a) The following systems of records are eligible for exemption under 5 U.S.C. 552a(k)(5) because they contain investigatory material compiled solely for the purpose of determining suitability, eligibility, or qualifications for Federal civilian employment, military service, Federal contracts, or access to classified information, but only to the extent that the disclosure of such material would reveal the identity of a source who furnished information to the Government under an express promise that the identity of the source would be held in confidence, or, prior to January 1, 1975 , under an implied promise that the identity of the source would be held in confidence. Accordingly, these systems of records are exempt from (c)(3), (d)(1), (d)(2), (d)(3), (d)(4), (e)(1), (e)(4)(G), (e)(4)(I) and (f) of 5 U.S.C. 552a.

1. (1) DOL/OASAM-20 (Personnel Investigation Records), a system of records maintained by the Office of the Assistant Secretary for Administration and Management (OASAM).
2. (2) DOL/OIG-1 (General Investigative Files, and Subject Title Index, USDOL/OIG), a system of records maintained by the Office of the Inspector General (OIG).
3. (3) DOL/OIG-2 (Freedom of Information/Privacy Acts Records), a system of records maintained by the OIG.
4. (4) DOL/OIG-3 (Case Development Records), a system of records maintained by the OIG.
5. (5) DOL/OIG-5 (Investigative Case Tracking Systems/Audit Information Reporting Systems, USDOL/OIG), a system of records maintained by the OIG.

(c) The systems of records listed under paragraphs (a)(1) through (a)(5) of this section are exempted for the reasons set forth in paragraphs (c)(1) through (6) of this section, from the following subsections of 5 U.S.C. 552a:

1. (1) Subsection (c)(3). The release of the disclosure accounting, for disclosures made pursuant to subsection (b) of the Act, including those permitted under the routine uses published for this system of records, would enable the subject of an investigation of an actual or potential civil case to determine whether he or she is the subject of investigation, to obtain valuable information concerning the nature of that investigation and the information obtained, and to determine the identity of witnesses or informants. Such access to investigative information would, accordingly, present a serious impediment to the investigation. In addition, disclosure of the accounting would constitute notice to the individual of the existence of a record even though such notice requirement under subsection (f)(1) is specifically exempted for this system of records.
2. (2) Subsections (d)(1), (d)(2), (d)(3), and (d)(4). Access to the records contained in these systems would inform the subject of an actual or potential investigation of the existence of that investigation, of the nature and scope of the information and evidence obtained as to his or her activities, and of the identity of witnesses or informants. Such access would, accordingly, provide information that could enable the subject to avoid detection. This result, therefore, would constitute a serious impediment to effective investigation not only because it would prevent the successful completion of the investigation but also because it could endanger the physical safety of witnesses or informants, lead to the improper influencing of witnesses, the destruction of evidence, or the fabrication of testimony.
3. (3) Subsection (e)(1). The notices for these systems of records published in the Federal Register set forth the basic statutory or related authority for maintenance of this system. However, in the course of civil and related investigations, cases and matters, the agency will occasionally obtain information concerning actual or potential violations of law that are not strictly or technically within its statutory or other authority or may compile information in the course of an investigation which may not be relevant to a specific case. In the interests of effective investigation, it is necessary to retain some or all of such information in these systems of records since it can aid in establishing patterns of compliance and can provide valuable leads for Federal and other law enforcement agencies. Moreover, it is difficult to know during the course of an investigation what is relevant and necessary. In this connection, facts or evidence may not seem relevant at first, but later in the investigation, their relevance is borne out.
4. (4) Subsections (e)(4)(G) and (H). Since an exemption is being claimed for subsections (f) (Agency Rules) and (d) (Access to Records) of the Act, these subsections are inapplicable to the extent that these systems of records are exempted from subsections (f) and (d).
5. (5) Subsection (e)(4)(I). The categories of sources of the records in these systems have been published in the Federal Register in broad generic terms in the belief that this is all that subsection (e)(4)(I) of the Act requires. In the event, however, that this subsection should be interpreted to require more detail as to the identity of sources of the records in this system, exemption from this provision is necessary in order to protect the confidentiality of the sources of investigatory information. Such exemption is further necessary to protect the privacy and physical safety of witnesses and informants.
6. (6) Subsection (f). Procedures for notice to an individual pursuant to subsection (f)(1) as to existence of records pertaining to the individual dealing with an actual or potential investigation must be exempted because such notice to an individual would be detrimental to the successful conduct and/or completion of an investigation or case, pending or future. In addition, mere notice of the fact of an investigation could inform the subject or others that their activities are under or may become the subject of an investigation and could enable the subjects to avoid detection, to influence witnesses improperly, to destroy evidence, or to fabricate testimony. Since an exemption is being claimed for subsection (d) of the Act (Access to Records), the rules required pursuant to subsections (f)(2) through (5) are inapplicable to these systems of records to the extent that these systems of records are exempted from subsection (d).