The elections to the Chamber of Deputies are held in all election regions of the Czech Republic in compliance with the principle of proportional representation. Each higher self-governed unit defined by special legal regulations^8a) is regarded as an election region.

^{8a) Constitutional Act No. 347/1997 Coll. on creation of higher self-governing territorial units and on change of Constitutional Act No. 1/1993 Coll. of the Czech National Council, the Constitution of the Czech Republic, as amended by Constitutional Act No. 176/2001 Coll.}