N.Y.C. Charter § 829: Section 829. Performing administrative functions for the office of administrative trials and hearings and the board of standards and appeals.

The mayor may designate the department to perform specified administrative functions for the office of administrative trials and hearings and the board of standards and appeal when the mayor determines that such a designation will reduce costs or result in more effective performance of such functions. Such functions may include personnel services, labor relations, facilities management, purchasing, management information systems, budget administration, and internal auditing.