(a) Acquisitions for construction (as defined in Federal Acquisition Regulation (FAR) 2.101) estimated to cost $2 million or less must be set-aside on a class basis for exclusive participation by small business or disadvantaged business concerns. This class set-aside does not apply when:

1. (1) The acquisition is procured using simplified acquisition procedures;
2. (2) A non-competitive acquisition has been approved under the procedures of FAR 6.3;
3. (3) Work is to be performed outside the U.S.; or
4. (4) The Bureau Procurement Chief determines that adequate competition is not likely to be obtained if the acquisition is restricted to small business concerns.