Procurements may be made under emergency conditions as defined in regulations adopted by the commissioner when there exists a threat to public health, welfare, or safety, when a situation exists that makes a procurement through competitive sealed bidding or competitive sealed proposals impracticable or contrary to the public interest, or to protect public or private property. An emergency procurement need not be made through competitive sealed bidding or competitive sealed proposals but shall be made with competition that is practicable under the circumstances. A written determination by the chief procurement officer, or, for construction contracts, leases of real property, or procurements for the state equipment fleet, the commissioner of transportation and public facilities, of the basis for the emergency and for the selection of the particular contractor shall be included in the contract file. The written determination must include findings of fact that support the determination. Except when there is insufficient time for the chief procurement officer to make the written determination required by this section, the chief procurement officer may not delegate the authority to make the determination.