41 CFR § 102-33.95
What is the process for budgeting to acquire Commercial Aviation Services (CAS)?
June 9, 2020
Except for leases and capital leases, for which you must have specific Congressional authorization as required by 31 U.S.C. 1343, you may budget to fund your CAS out of your agency's operating budget. Also see §§102-33.70 and 102-33.75.