Despite any other provision of this Act, an authorised medical officer is not required--
(a) to take or complete a step referred to in section 27, or
(b) to bring a person before the Tribunal for a mental health inquiry,while the person is suffering from a condition or illness other than a mental illness or other mental condition and is not, in the officer's opinion, fit to be the subject of the proposed action due to the seriousness of the person's condition or illness.