(d) The president of the local board of health, if such office exists,
and the local commissioner of health or health officer shall be
ex-officio members of the board of managers of the laboratory.
2. In cities when more than one laboratory is established, only one
board of managers shall be appointed, which shall have jurisdiction over
all the laboratories established or operating under sections five
hundred forty to five hundred forty-three inclusive, of this chapter, in
said city.