FAR 13 and Large Business Award

Isn't there always (the answer is "not always")?

Part 13 - Simplified Acquisition Procedures | Acquisition.GOV

FAR 13.106-1(b) - 

 Soliciting from a single source. (1) For purchases not exceeding the simplified acquisition threshold. (i) Contracting officers may solicit from one source if the contracting officer determines that the circumstances of the contract action deem only one source reasonably available (e.g., urgency, exclusive licensing agreements, brand-name or industrial mobilization).

Single source in FAR 13 below the SAT. Sole source (FAR 6) applies above the SAT. 

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Additionally, if there isn't a reason to go around a set aside requirement (one source/urgency/no expectation of fair and reasonable pricing/competition/etc.) you don't.

New CS said:

13.003(b)(1) Acquisitions of supplies or services that have an anticipated dollar value above the micro-purchase threshold, but at or below the simplified acquisition threshold, shall be set aside for small business concerns.

Is there an exception to the above reference that allows the use of FAR part 13 to solicit and award to a large business?

FAR 19.502-2(a):

Quote

Each acquisition of supplies or services that has an anticipated dollar value above the micro-purchase threshold, but not over the simplified acquisition threshold, shall be set aside for small business unless the contracting officer determines there is not a reasonable expectation of obtaining offers from two or more responsible small business concerns that are competitive in terms of fair market prices, quality, and delivery.

Thank you