Where it is established that a measure is inconsistent with Article 401, 402 or 403, that measure is still permissible under this Agreement where it can be demonstrated that:
(a) the purpose of the measure is to achieve a legitimate objective;
(b) the measure does not operate to impair unduly the access of persons, goods, services or investments of a Party that meet that legitimate objective;
(c) the measure is not more trade restrictive than necessary to achieve that legitimate objective; and
(d) the measure does not create a disguised restriction on trade.