; (ii) instruction on methods and tools to identify potential subcontractors that are small business concerns; and (iii) assistance to increase awards to subcontractors that are small business concerns through visits, training, and reviews of past performance; (C) providing counseling on how a small business concern may promote its capacity to contractors awarded contracts containing the clause described in section 8(d)(3); and (D) conducting periodic reviews of contractors awarded contracts containing the clause described in section 8(d)(3) to assess compliance with subcontracting plans required under section 8(d)(6). (2) Certification requirements .