(a) Investigatory material compiled for law enforcement purposes in the following systems of records is exempt from §§ 310.3 through 310.9 and § 310.10(c)(2) of these rules;

Provided, however, That if any individual is denied any right, privilege, or benefit to which he/she would otherwise be entitled under Federal law, or for which he/she would otherwise be eligible, as a result of the maintenance of such material, such material shall be disclosed to such individual, except 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 September 27, 1975, under an implied promise that the identity of the source would be held in confidence:

(b) Investigatory material compiled solely for the purpose of determining suitability, eligibility, or qualifications for Corporation employment to the extent that disclosure of such material would reveal the identity of a source who furnished information to the Corporation under an express promise that the identity of the source would be held in confidence, or, prior to September 27, 1975, under an implied promise that the identity of the source would be held in confidence, in the following systems of records, is exempt from §§ 310.3 through 310.9 and § 310.10(c)(2) of these rules:

(c) Testing or examination material used solely to determine or assess individual qualifications for appointment or promotion in the Corporation's service, the disclosure of which would compromise the objectivity or fairness of the testing, evaluation, or examination process in the following system of records, is exempt from §§ 310.3 through 310.9 and § 310.10(c)(2) of these rules: