20 C.F.R. § 402.80 Exemption two for withholding records: Internal personnel rules and practices.
Title 20 - Employees' Benefits
We are not required to release records that are “related solely to the internal personnel rules and practices of an agency.” Under this exemption, we may withhold routine internal agency practices and procedures. For example, we may withhold guard schedules and rules governing parking facilities or lunch periods. Also under this exemption, we may withhold internal records whose release would help some persons circumvent the law or agency regulations. For example, we ordinarily do not disclose manuals that instruct our investigators or auditors how to investigate possible violations of law, to the extent that this release would help some persons circumvent the law.
Title 20: Employees' Benefits
PART 402—AVAILABILITY OF INFORMATION AND RECORDS TO THE PUBLIC
§ 402.80 Exemption two for withholding records: Internal personnel rules and practices.