The secretary shall constitute the sole agency of the state for the purpose of:
(a) Making an inventory of existing medical facilities, surveying the need for construction of medical facilities and developing a program of construction as provided in K.S.A. 65-415 to 65-417 , inclusive, and any amendments thereto; and
(b) developing and administering a state medical facilities plan as provided in K.S.A. 65-418 to 65-423 , inclusive, and any amendments thereto.