; and (v) any wage and fringe benefit rates for the occupation established by chapter 67 of title 41 (known as the McNamara-O’Hara Service Contract of 1965). (B) Occupation designation For purposes of this paragraph, the term occupation does not include an occupation that is a subset of a Standard Occupational Classification or a Department of Labor approved Occupational Information Network subclassification if such subset or subclassification would result in an average wage that is lower than the average wage in the Standard Occupational Classification from which the subset or subclassification is derived. (2) Wage surveys The Secretary of Labor may only consider Federal data sources and may not permit the use of private wage surveys or wage surveys conducted by State or local public agencies or private entities to establish the mean wage for an occupation under paragraph (1)(A)(i). (3) Labor certifications Prior to approving a labor certification, the Secretary of Labor shall— (A) cross reference each employer applicant with relevant Department of Labor databases, including the Equal Employment Opportunity Commission database, and National Labor Relations Board databases to determine whether a labor dispute or investigation is ongoing