If the Governor determines that a catastrophic health emergency exists, the Governor may issue a proclamation under this subtitle. The proclamation shall indicate: the nature of the catastrophic health emergency; the areas threatened or affected; and the conditions that: led to the catastrophic health emergency; or made possible the termination of the emergency. The Governor shall rescind a proclamation issued under this section whenever the Governor determines that the catastrophic health emergency no longer exists. Unless renewed, the proclamation expires 30 days after issuance. The Governor may renew the proclamation for successive periods, each not to exceed 30 days, if the Governor determines that a catastrophic health emergency continues to exist.