If a one-stop delivery system has been established in a local area prior to August 7, 1998, the local board, the chief elected official, and the Governor involved may agree to certify an entity carrying out activities through the system as a one-stop operator for purposes of subsection (d) of this section, consistent with the requirements of subsection (b) of this section, of the memorandum of understanding, and of section
2864
(c) of this title.