The purpose of this subpart is to establish principles to govern, as nearly as is administratively feasible and practical, the employment practices of the Federal Government generally, and of individual agencies, that affect the recruitment, measurement, ranking, and selection of individuals for initial appointment and competitive promotion in the competitive service or in positions in the government of the District of Columbia required to be filled in the same manner that positions in the competitive service are filled. For the purpose of this subpart, the term “employment practices” includes the development and use of examinations, qualification standards, tests, and other measurement instruments.