5.—(1) The Combined Authority must appoint at least one member of each of the constituent councils to the overview and scrutiny committee appointed by the Combined Authority, so that the members of the committee taken as a whole reflect so far as reasonably practicable the balance of political parties for the time being prevailing among members of the constituent councils.
(2) An overview and scrutiny committee appointed by the Combined Authority may not include any substitute member of the Combined Authority.
(3) The Combined Authority must appoint an appropriate person(1) who is a member of one of the constituent councils to be the chair of the overview and scrutiny committee appointed by the Combined Authority.
See paragraph 3(5) of Schedule 5A to the 2009 Act.