Except as otherwise provided in Section 5 of this Act, every individual charged with the responsibility of grounding aircraft shall have the power to control the movement of aircraft upon the ground or surface of a public airport and forbid the taking off of aircraft from or landing at such public airport to any person or persons whenever there is reason to believe that such movement or flight will endanger the public safety, health, welfare or common defense due to the existence of any one or more of the following conditions:
620 ILCS 15/3