Under what circumstances and for what purpose can the Central Government take measures related to aircraft, as provided under section 8B of the Aircraft Act?

To prevent danger arising to public health during an outbreak of a dangerous epidemic disease, Explanation: Section 8B. Emergency powers for protecting the public health.--(1) If the Central Government is satisfied that India or any part thereof is visited by or threatened with an outbreak of any dangerous epidemic disease, and that the ordinary provisions of the law for the time being in force are insufficient for the prevention of danger arising to the public health through the introduction or spread of the disease by the agency of aircraft, the Central Government may take such measures as it deems necessary to prevent such danger.