For purposes of this subpart:

Nearest similar wage area means the nearest wage area which is most similar to the local wage area in terms of private employment, population, relative numbers of private employers in major industry categories, and kinds and sizes of industry establishments and in which adequate private establishments exist in the survey area whose activities are similar to those in the dominant industry.

Principal types of appropriated or nonappropriated fund positions means those groups of occupations which require work of a specialized nature and which are peculiar to a specific Government industry which is the dominant industry among the total wage employment in the wage area.

Specialized private industry means private industry establishments in those industry groups, comparable to the specialized Government industries listed in §532.303 of this section, which must be included in a wage survey in order to obtain data comparable to a dominant industry.