2. Certain measures in this Act are intended to enable public health authorities to engage in public health monitoring activities and to give public health authorities the power to take action in cases where the health of the population is threatened.
In this Act, a threat to the health of the population means the presence within the population of a biological, chemical or physical agent that may cause an epidemic if it is not controlled.
For the purposes of this Act, the public health authorities include the Minister of Health and Social Services, the national public health director appointed under the Act respecting the Ministère de la Santé et des Services sociaux (chapter M-19.2) and the public health directors appointed under the Act respecting health services and social services (chapter S-4.2).