law: Constitution of India, 1949 
     19. Protection of certain rights regarding
  
  freedom of speech etc.- 
  (1) All citizens shall have the right- 
  (a) to freedom of
  
  speech and expression;
  (b) to assemble
  
  peaceably and without arms;
  (c) to form
  
  associations or unions;
  (d) to move freely
  
  throughout the territory of India;
  (e) to reside and
  
  settle in any part of the territory of India; and
  (f) omitted
  (g) to practice any
  
  profession, or to carry on any occupation, trade or business.
  (2) Nothing in sub-clause (a) of clause (1)
  
  shall affect the operation of any existing law, or prevent the State from
  
  making any law, in so far as such law imposes reasonable restrictions on the
  
  exercise of the right conferred by the said sub-clause in the interests of the
  
  sovereignty and integrity of India, the security of the State, friendly
  
  relations with foreign States, public order, decency or morality or in relation
  
  to contempt of court, defamation or incitement to an offence.
  (3) Nothing in sub-clause (b) of the said
  
  clause shall affect the operation of any existing law in so far as it imposes,
  
  or prevent the State from making any law imposing, in the interests of the
  
  sovereignty and integrity of India or public order, reasonable restrictions on
  
  the exercise of the right conferred by the said sub-clause.
  (4) Nothing in sub-clause (c) of the said
  
  clause shall affect the operation of any existing law in so far as it imposes,
  
  or prevent the State from making any law imposing, in the interests of the
  
  sovereignty and integrity of India or public order or morality, reasonable
  
  restrictions on the exercise of the right conferred by the said sub-clause.
  (5) Nothing in sub-clauses (d) and (e) of the
  
  said clause shall affect the operation of any existing law in so far as it
  
  imposes, or prevent the State from making any law imposing, reasonable
  
  restrictions on the exercise of any of the rights conferred by the said
  
  sub-clauses either in the interests of the general public or for the protection
  
  of the interests of any Scheduled Tribe.
  (6) Nothing in sub-clause (g) of the said
  
  clause shall affect the operation of any existing law in so far as it imposes,
  
  or prevent the State from making any law imposing, in the interests of the
  
  general public, reasonable restrictions on the exercise of the right conferred
  
  by the said sub-clause, and, in particular, nothing in the said sub-clause
  
  shall affect the operation of any existing law in so far as it relates to, or
  
  prevent the State from making any law relating to,- 
  (i) the professional
  
  or technical qualifications necessary for practicing any profession or carrying
  
  on any occupation, trade or business, or
  (ii) the carrying on
  
  by the State, or by a corporation owned or controlled by the State, of any
  
  trade, business, industry or service, whether to the exclusion, complete or
  
  partial, of citizens or otherwise.