Introduction

• Article 170 deals with the composition of the Legislative Assemblies of States.
• It lays down:
  • the size of State Legislative Assemblies
  • the principle of territorial constituencies
  • readjustment of seats after each census. 

Exact constitutional idea

• Article 170 broadly provides that:
  • the Legislative Assembly of each State shall consist of members chosen by direct election from territorial constituencies
  • the number of seats in the Assembly shall not be more than 500 and not less than 60, subject to constitutional exceptions in special cases
  • the division of each State into constituencies should, as far as practicable, ensure that the ratio between population and seats is broadly the same throughout the State.

Article 170(1)

• Article 170(1) says that the Legislative Assembly of each State shall consist of not more than 500 and not less than 60 members chosen by direct election from territorial constituencies in the State.
• This fixes the general constitutional range for the strength of State Assemblies.

Territorial constituencies

• The State is divided into territorial constituencies for Assembly elections. 
• This means elections to the Legislative Assembly are based on geographical constituencies, not on occupational or communal representation. This is a direct inference from the constitutional language. 

Population–seat principle

• Article 170(2) provides that each State shall be divided into territorial constituencies in such manner that the ratio between the population of each constituency and the number of seats allotted to it is, so far as practicable, the same throughout the State. 
• This reflects the democratic principle of equal representation based on population, though absolute mathematical equality is not required because the Constitution uses the words “so far as practicable.” 

Meaning of population

• Article 170 includes an explanation on the meaning of population.
• For the current constitutional scheme, population is to be understood with reference to the relevant published census figures, subject to the constitutional freeze created by later amendments. 

Article 170(3): readjustment after census

• Article 170(3) says that upon the completion of each census, the total number of seats in the Legislative Assembly of each State and the division of the State into territorial constituencies shall be readjusted by such authority and in such manner as Parliament may by law determine. 
• This makes Article 170 the State-level counterpart of Article 82, which performs a similar function for the Lok Sabha. 

Effect on an existing Assembly

• Article 170(3) also says that such readjustment shall not affect representation in the existing Legislative Assembly until its dissolution. 
• So even if a readjustment exercise is completed, the sitting Assembly continues until the end of its term unless otherwise dissolved. 

Date from which readjustment takes effect

• The constitutional text further provides that the readjustment takes effect from such date as the President may, by order, specify. 
• Until then, elections may continue on the basis of the earlier constituencies. 

Current constitutional freeze

• The most important current point is that Article 170 contains a freeze similar to Article 82.
• It says that, until the relevant figures for the first census taken after the year 2026 have been published, it is not necessary to readjust:
  • the total number of seats in State Legislative Assemblies as readjusted on the basis of the 1971 census
  • and the territorial constituencies as may be readjusted on the basis of the 2001 census. 

Practical meaning of the freeze

• In practical terms, this means that full seat reallocation among Assembly constituencies at the State level remains constitutionally frozen until the first census after 2026 and publication of its relevant figures. 
• This is a crucial exam point because many delimitation debates in India revolve around this constitutional freeze. 

Constitutional exceptions

• Although Article 170 provides the general rule of 60 to 500 seats, some smaller States have historically had special arrangements through constitutional provisions and later laws. This is why the phrase “subject to constitutional exceptions” is important in actual constitutional practice. 

Relation with Article 168

• Article 170 should be read with Article 168, which provides for the constitution of the legislatures in States.
• Article 168 tells us what bodies make up the State Legislature; Article 170 specifically deals with the Legislative Assembly. 

Relation with Article 82

• Article 170 is often compared with Article 82.
• Article 82 deals with:
  • allocation of Lok Sabha seats to States
  • division of States into Lok Sabha constituencies
• Article 170 deals with:
  • number of seats in State Assemblies
  • division of the State into Assembly constituencies. 

Why Article 170 is important

• Article 170 is important because it forms the constitutional basis for:
  • democratic representation in State Assemblies
  • equality of population representation within a State
  • delimitation after census
  • future debates on State-level seat restructuring.

Key points to remember

• Article 170 deals with the composition of State Legislative Assemblies. 
• General size range:
  • maximum 500
  • minimum 60. 
• Members are chosen by direct election from territorial constituencies. 
• Ratio between population and seats should be as far as practicable the same throughout the State.  
• Readjustment is linked to the first census after 2026 because of the constitutional freeze. 

Conclusion

Article 170 is the key constitutional provision governing the size and territorial basis of State Legislative Assemblies. Its importance lies in ensuring population-based democratic representation, while also reflecting India’s long constitutional freeze on seat readjustment until the first census after 2026.