Explanation:

•  Clause (2) of Article 19 of Indian constitution contains the grounds on which restrictions on the freedom of speech and expression can be imposed:- 
• 1) Security of State: Under Article 19(2) reasonable restrictions can be imposed on freedom of speech and expression in the interest of security of State. However the term “security” is very crucial one. 
• 2) Friendly relations with foreign states: In the present global world, a country has to maintain good and friendly relationship with other countries. Something which has potential to affect such relation ship should be checked by government. Keeping this thing in mind, this ground was added by the constitution (First Amendment) Act, 1951. 
• 3) Public Order: Next restriction prescribed by constitution is to maintain public order. This ground was added by the Constitution (First Amendment) Act. 'Public order' is an expression of wide connotation and signifies "that state of tranquility which prevails among the members of political society as a result of internal regulations enforced by the Government which they have established.