The head of each agency referred to under paragraphs (1) and (2) of shall appoint or designate a Chief Human Capital Officer, who shall—

((1)) advise and assist the head of the agency and other agency officials in carrying out the agency’s responsibilities for selecting, developing, training, and managing a high-quality, productive workforce in accordance with merit system principles;

((2)) implement the rules and regulations of the President and the Office of Personnel Management and the laws governing the civil service within the agency; and

((3)) carry out such functions as the primary duty of the Chief Human Capital Officer.