Greece - 1975 Constitution

Part III - Organization and Functions of the State
Title Article 54
Chapter 1 - Election and Composition of Parliament
Section III - Parliament
Article

54

(3) Part of the Parliament, comprising not more than the one twentieth of the total number of its members, may be elected throughout the Country at large in proportion to the total electoral strength of each party throughout the Country, as specified by law.

Categories - Electoral party (Electoral rules/formula)
Source Gisbert H. Flanz ed. 2004. Constitutions of the Countries of the World. Dobbs Ferry, New York: Oceana Publications.