Section 42.1305 - Contract clauses(a) The contracting officer shall insert the clause at 52.242-14, Suspension of Work, in solicitations and contracts when a fixed-price construction or architect-engineer contract is contemplated.(b)(1) The contracting officer may, when contracting by negotiation, insert the clause at 52.242-15, Stop-Work Order, in solicitations and contracts for supplies, services, or research and development.(2) If a cost-reimbursement contract is contemplated, the contracting officer shall use the clause with its Alternate I.(c) The contracting officer shall insert the clause at 52.242-17, Government Delay of Work, in solicitations and contracts when a fixed-price contract is contemplated for supplies other than commercial or modified-commercial products. The clause use is optional when a fixed-price contract is contemplated for services, or for supplies that are commercial or modified-commercial products.48 FR 42159, Sept. 19, 1983, as amended at 50 FR 2270, Jan. 15, 1985; 50 FR 25680, June 20, 1985. Redesignated and amended at 60 FR 48241, 48249, Sept. 18, 1995; 72 FR 27385 , May 15, 2007; 86 FR 61030 , Nov. 4, 2021