Act amending Act No. 59 / 2006 Coll., on the prevention of major accidents caused by selected hazardous chemicals or chemical products and amending Act No. 258 / 2000 Coll., on the Protection of Public Health and on the amendment of certain related acts, as amended, and Act No. 320 / 2002 Coll., on the amendment and repeal of certain laws in connection with the cessation of the activities of district authorities, as amended (Act on the Prevention of Major Accidents), as amended