The provisions of 5 U.S.C. 552a(c)(3), (d), (e)(1), (e)(4)(G), (H) and (I) and (f) shall not apply to any system of records maintained by DFC that is—

(a) Subject to the provisions of 5 U.S.C. 552(b)(1);

(b) Composed of Investigatory material compiled for law enforcement purposes other than those specified in 5 U.S.C. 552a(j)(2);

(c) Required by statute to be maintained and used solely as statistical records;

(d) Composed of 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 DFC may determine, in its sole discretion, that the disclosure of such material would reveal the identity of the source who, subsequent to September 27, 1975, furnished information to the Government under an express promise that the identity of the source would be held in confidence or, prior to such date, under an implied promise to such effect; and

(e) Composed of testing or examination materials used solely to determine individual qualifications for appointment or promotion in the Federal service and DFC determines, in its sole discretion, that disclosure of such materials would compromise the fairness of the testing or examination process.