48 CFR 36.502 : Federal Acquisition Regulations System (Section 1.000 To Parts 9906-9999) — Federal Acquisition Regulation (Parts 1 - 99) (Section 1.000 To Parts 54-99) — Special Categories Of Contracting (Parts 34 - 41) (Section 34.000 To Section 41.702) — Construction And Architect-Engineer Contracts (Section 36.000 To Section 36.702) — Contract Clauses (Section 36.500 To Section 36.523) — Differing site conditions.

The contracting officer shall insert the clause at 52.236-2, Differing Site Conditions, in solicitations and contracts when a fixed-price construction contract or a fixed-price dismantling, demolition, or removal of improvements contract is contemplated and the contract amount is expected to exceed the simplified acquisition threshold. The contracting officer may insert the clause in solicitations and contracts when a fixed-price construction or a fixed-price contract for dismantling, demolition, or removal of improvements is contemplated and the contract amount is expected to be at or below the simplified acquisition threshold.