(a) Except as provided in §§ 9-1903 and 9-1904 of this subtitle, on or after July 1, 1993, a manufacturer or distributor may not sell or offer for sale or for promotional purposes any package or packaging component or any product in a package or packaging component to which any of the following was intentionally added during manufacture or distribution:
(1) Lead;
(2) Cadmium;
(3) Mercury; or
(4) Hexavalent chromium.
(b) The sum of the concentration levels of lead, cadmium, mercury, and hexavalent chromium incidentally present in a package or packaging component may not exceed:
(1) By July 1, 1993, 600 parts per million by weight or 0.06%;
(2) By July 1, 1994, 250 parts per million by weight or 0.025%; and
(3) By July 1, 1995, 100 parts per million by weight or 0.01%.
(c) Tin plated steel that meets the American Society for Testing and Materials Specification A-623 shall be considered a single packaging component.