13 C.F.R. § 126.612
A contracting officer may award a sole source contract to a HUBZone small business concern only when the contracting officer determines that:
(b) The anticipated award price of the contract, including options, will not exceed:
[63 FR 31908, June 11, 1998, as amended at 69 FR 29425, May 24, 2004; 74 FR 46887, Sept. 14, 2009; 83 FR 12852, Mar. 26, 2018; 84 FR 65248, Nov. 26, 2019; 86 FR 61673, Nov. 8, 2021]