<s>[INST] Article 304 of Indian Constitution [/INST] Restrictions on trade, commerce and intercourse among States Notwithstanding anything in Article 301 or Article 303, the Legislature of a State may by law
(a) impose on goods imported from other States or the Union territories any tax to which similar goods manufactured or produced in that State are subject, so, however, as not to discriminate between goods so imported and goods so manufactured or produced; and
(b) impose such reasonable restrictions on the freedom of trade, commerce or intercourse with or within that State as may be required in the public interest: Provided that no Bill or amendment for the purposes of clause shall be introduced or moved in the Legislature of a State without the previous sanction of the President"
Article 305 of Indian Constitution,"Saving of existing laws and laws providing for State monopolies Nothing in Articles 301 and 303 shall affect the provisions of any existing law except in so far as the President may be order otherwise direct; and nothing in Article 301 shall affect the operation of any law made before the commencement of the Constitution (Fourth Amendment) Act, 1955 , in so far as it relates to, or prevent Parliament or the Legislature of a State from making any law relating to, any such matter as is referred to in sub clause (ii) of clause ( 6 ) of Article 19"," </s>