I.-For the nuclear activities referred to in Article L. 1333-10, the person responsible for the nuclear activity and, where applicable, the head of the establishment when a different person is involved, shall send a dossier to the Nuclear Safety Authority containing :
1° In the case of a natural person, their surname, first name, position and contact details;
2° In the case of a legal entity, its name or corporate name, its legal form and the address of its registered office;
3° The address where the nuclear activity is carried out;
4° The nature of the nuclear activities carried out and the associated regime in application of this section.
II -The Nuclear Safety Authority may request, within six months of receipt of the dossier referred to in I, the production of the additional documents referred to in Articles R. 1333-111, R. 1333-114, R. 1333-119, R. 1333-120, R. 1333-121, R. 1333-123 and R. 1333-124.
III – In the case referred to in I, the Nuclear Safety Authority may lay down the measures necessary to protect the interests referred to in Article L. 1333-7. These measures may not entail any significant changes:
1° to the shell of the installation in which the nuclear activity is carried out ;
2° in its operating mode when the conditions under which the nuclear activity is carried out remain unchanged.
IV – The provisions of III do not apply when a nuclear activity previously subject to the declaration or registration system becomes subject to the authorisation system mentioned in article L. 1333-8.