Member States shall ensure that, as soon as practicable following a major accident, the operator shall be required, using the most appropriate means to:

1. (a)

   inform the competent authority;

2. (b)

   provide the competent authority with the following information as soon as it becomes available:

   1. (i)

      the circumstances of the accident;

   2. (ii)

      the dangerous substances involved;

   3. (iii)

      the data available for assessing the effects of the accident on human health, the environment and property;

   4. (iv)

      the emergency measures taken;

3. (c)

   inform the competent authority of the steps envisaged to:

   1. (i)

      mitigate the medium-term and long-term effects of the accident;

   2. (ii)

      prevent any recurrence of such an accident;

4. (d)

   update the information provided if further investigation reveals additional facts which alter that information or the conclusions drawn.