(1) This article applies to the following persons -

(a) the UK ETS authority;

(b) a national authority;

(c) a regulator;

(d) the registry administrator.

(2) A person to whom this article applies must not disclose information held or obtained under UK ETS legislation to another person.

(3) But paragraph (2) does not apply to the disclosure of information by the person in any of the following circumstances -

(a) if the disclosure is required by law;

(b) if the disclosure is necessary or expedient -

(i) for the exercise of the person’s functions under UK ETS legislation;

(ii) for the purpose of the prevention, investigation, detection or prosecution of criminal offences or the execution of criminal penalties;

(iii) in the case of a disclosure by a national authority -

(aa) for the purpose of monitoring and evaluating the effectiveness of the UK ETS;