Lustration in Poland refers to the policy of limiting the participation of former communists, and especially informants of the communist secret police (from the years 1944–90), in the successor governments or even in civil service positions. Lustration, "cleansing", derives from Latin lustratio, a Roman purification ceremony. The first lustration bill was passed by the Polish Parliament already in 1992, but it was declared unconstitutional by the Constitutional Tribunal of the Republic of Poland. Several other projects were then submitted and reviewed by a dedicated commission, resulting in a new lustration law passed in 1996.