The relevant text of Article XX of GATT 1994 reads as follows:
"Subject to the requirement that such measures are not applied in a manner which
would constitute a means of arbitrary or unjustifiable discrimination between
countries where the same conditions prevail, or a disguised restriction on
international trade, nothing in this Agreement shall be construed to prevent the
adoption or enforcement by any Member of measures:
(…)
(b) necessary to protect human, animal or plant life or health;
(…)
(d) necessary to secure compliance with laws or regulations which are not
inconsistent with the provisions of this Agreement, including those relating to
customs enforcement, the enforcement of monopolies operated under paragraph 4 of
Article II and Article XVII, the protection of patents, trade marks and copyrights, and
the prevention of deceptive practices;