(a) The excepted service shall include all civilian positions in the executive branch of the Government which are specifically excepted from the requirements of the Civil Service Act or from the competitive service by or pursuant to statute or by OPM under §6.1 of this subchapter.

(b) Excepted service shall have the same meaning as the words “unclassified service”, or “unclassified civil service”, or “positions outside the competitive civil service” as used in existing statutes and executive orders.

(c) Excepted position shall have the same meaning as “unclassified position”, or “position excepted by law”, or “position excepted by executive order”, or “position excepted by Civil Service Rule”, or “position outside the competitive service” as used in existing statutes and Executive orders.