Executive agencies, upon approval from GSA, must provide—

(a) Building services such as custodial, solid waste management (including recycling), heating and cooling, landscaping and grounds maintenance, tenant alterations, minor repairs, building maintenance, integrated pest management, signage, parking, and snow removal, at appropriate levels to support Federal agency missions; and

(b) Arrangements for raising and lowering the United States flags at appropriate times. In addition, agencies must display P.O.W. and M.I.A. flags at locations specified in 36 U.S.C. 902 on P.O.W./M.I.A. flag display days.