48 C.F.R. § 917.7401
The acquisition of real estate requires the involvement of a DOE Certified Realty Specialist, as specified at 917.7402. Special circumstances and situations may arise under cost-type contracts when, in the performance of the contract or subcontract, the performer shall be required, or otherwise find it necessary, to acquire real estate or interests therein by:
[61 FR 41707, Aug. 9, 1996, as amended at 76 FR 7693, Feb. 11, 2011]