Under the ISM Code, what activities must be carried out on all ships at security level I, in order to identify and take preventive measures against security incidents?

(2) controlling access to the ship; (3) controlling the embarkation of persons and their effects; (4) monitoring restricted areas to ensure that only authorized persons have access; (5) monitoring of deck areas and areas surrounding the ship; (6) supervising the handling of cargo and ship's stores; and (7) ensuring that security communication is readily available.