(a) Heads of agencies, with requisite statutory authority, may determine in writing to authorize contracting officers to enter into or renew any management and operating contract in accordance with the agency's statutory authority, or 41 U.S.C. chapter 33, and the agency's regulations governing such contracts. This authority shall not be delegated. Every contract so authorized shall show its authorization upon its face.(b) Agencies may authorize management and operating contracts only in a manner consistent with the guidance of this subpart and only if they are consistent with the situations described in 17.604.(c) Within 2 years of the effective date of this regulation, agencies shall review their current contractual arrangements in the light of the guidance of this subpart, in order to(1) identify, modify as necessary, and authorize management and operating contracts and(2) modify as necessary or terminate contracts not so identified and authorized, except that any contract with less than 4 years remaining as of the effective date of this regulation need not be terminated, nor need it be identified, modified, or authorized unless it is renewed or its terms are substantially renegotiated.48 FR 42163, Sept. 19, 1983, as amended at 50 FR 52434, Dec. 23, 1985; 79 FR 24202 , Apr. 29, 2014