除垢法案，（净化政策，英语：lustration），指纯化或洁净之意思。高度政治性政策，用于苏联解体后中、东欧国家转型正义时期，清除过往苏联残余旧势力的政策。

Lustration is the process of making something clear or pure, usually by means of a propitiatory offering.

It is also the purge of government officials once affiliated with the Communist system in Central and Eastern Europe. Various forms of lustration were employed in post-communist Europe. The concept might resemble de-Nazification in post-World War II Europe, and the de-Ba'athification in post-Saddam Hussein Iraq, and therefore resonates with concepts such as possible accountability for past human rights abuses, corruption or injustice. The term is taken from the Roman lustrum purification rituals.