Explanation:

Statement 1 is incorrect: A bill for this purpose can be introduced in the legislature only with the previous sanction of the president. Supplementary notes: INTER-STATE TRADE AND COMMERCE EXCEPTION  Articles 301 to 307 in Part XIII of the Constitution deal with the trade, commerce and intercourse within the territory of India.

The freedom guaranteed by Article 301 is a freedom from all restrictions, except those which are provided for in the other provisions (Articles 302 to 305) of Part XIII of the Constitution itself.  These are explained below:

 Parliament can impose restrictions on the freedom of trade commerce and intercourse between the states or within a sta in public interest.But, the Parliament cannot give preference one state over another or discriminate between the state except in the case of scarcity of goods in any part of India.

 The legislature of a state can impose reasonable restrictions the freedom of trade, commerce and intercourse with that state or within that state in public interest. But, a bill for this purpose can be introduced in the legislature only with the previous sanction of the president. Further, the state legislature cannot give preference to one state over another or discriminate between the states.

 The legislature of a state can impose on goods imported from other states or the union territories any tax to which similar goods manufactured in that state are subject. This provision prohibits the imposition of discriminatory taxes by the state.

 The freedom (under Article 301) is subject to the nationalisation laws (i.e., laws providing for monopolies in favour of the Cent or the states). Thus, the Parliament or the state legislature can make laws for the carrying on by the respective government any trade, business, industry or service, whether to texclusion, complete or partial, of citizens or otherwise.