Notwithstanding any other provision of this chapter, the Chief Procurement Officer may initiate a procurement above the small purchase amount where he/she determines that an unusual or unique situation exists that makes the application of all requirements of competitive sealed bidding or competitive sealed proposals contrary to the public interest and such procurement does not technically qualify as a sole source procurement. If determined as appropriate by the Chief Procurement Officer, any special procurement under this section shall be made with such competition as is practicable under the circumstances; provided, however, that the Chief Procurement Officer may determine under appropriate circumstances that there is only one logical choice as to a contractor to provide the goods and supplies or services necessitated by the special procurement. A written determination of the basis for the procurement and for the selection of the particular contractor shall be included by the Chief Procurement Officer in the procurement file. Any rights accorded to the Chief Procurement Officer by this section are expressly subject to and limited by the legal authorities. (Procurement regulations § 4-207, dated August 1, 2012)