(a) Except for those District government employees employed by agencies not subject to Chapter 6 of Title 1 [§ 1-601.01 et seq.], District government employees who participate in the procurement process shall be subject to the provisions of subchapter XVIII of Chapter 6 of Title 1 [§ 1-618.01 et seq.].
(b) Participation in the procurement process shall include involvement, either directly or indirectly, in:
(1) The decision, approval, disapproval, recommendation, or preparation of any part of a purchase request;
(2) Influencing the content of any specification or purchase standard;
(3) Rendering of advice;
(4) An investigation or audit; or
(5) Any other advisory capacity pertaining to any contract, subcontract, solicitation, or proposal.