The agencies transferred in accordance with this Section shall continue to be composed and selected as provided by law; each agency shall continue to exercise all powers, duties, functions, and responsibilities provided or authorized for each by the constitution or laws which are in the nature of policymaking, rulemaking, licensing, regulation, enforcement, or adjudication and also shall continue to exercise all advisory powers, duties, and functions provided by law; each agency shall continue to administer and implement all programs provided or authorized for each by law which relate to rulemaking, licensing, regulation, enforcement, and adjudication; each agency shall continue to be governed by the Administrative Procedure Act, in its entirety, including provisions relative to adjudication proceedings, unless otherwise specifically provided by law; the executive head of each such agency shall employ, appoint, remove, assign, and promote such personnel as is necessary for the efficient administration of such powers, duties, functions, and responsibilities and for the administration and implementation of such programs, in accordance with applicable civil service laws, rules, and regulations, and with policies and rules of the department to which the agency is transferred, and subject to budgetary control and applicable laws; except as specifically provided in Paragraphs (1), (2), and (3) of this Section. The agencies transferred as provided in this Section shall exercise the powers, duties, functions, and responsibilities and shall administer and implement the programs authorized in this Section independently of the secretary, the undersecretary, and any assistant secretary, except that:
(1) The secretary of the department to which each is transferred shall exercise all functions necessary for the administration and implementation of the policies and rules of the agency which do not relate to rulemaking, licensing, regulation, enforcement, and adjudication, including personnel management, except as provided in Paragraph (2) below.
(2) The undersecretary of the department to which each is transferred shall, under the supervision and control of the secretary, perform and administer all functions of each agency which are in the nature of accounting and budget control, management and program analysis, and grants management.
(3) The secretary of the department shall exercise all functions of the transferred agencies which relate to payroll, personnel management, procurement, and contract management, which functions are hereby transferred to the secretary; provided, however, that this Paragraph (3) shall not apply to any retirement systems or retirement board.