Constitution 1993 (last amended in 2013)
Article 16.1 The Chamber of Deputies shall have 200 Deputies who shall be elected for a term of four years.
ARTICLE 18.1 Elections to the Assembly of Deputies shall be held by secret ballot on the basis of a universal, equal, and direct right to vote, according to the principle of proportional representation.
ACT NO. 247 on Elections to the Parliament of the Czech Republic, and on Amendments of Certain Other Acts (September 27, 1995)
Article 26. For the purpose of elections to the Chamber of Delegates, the territory of the Czech Republic shall be divided into constituencies - electoral regions in which the elections shall be held on the principle of proportional representation.