2. Where the infringement of the rules laid down in this Regulation poses an immediate danger to human health or threatens to cause an immediate significant adverse effect upon the environment, the competent authority shall, or, where that infringement leads to a significant loss, the competent authority may, suspend the operation of the installation or part of it, and immobilise or prevent the movement of road vehicles, rail wagons or inland waterway vessels until compliance is restored in accordance with paragraph 1, points (b) and (c).