CSN EN 16604-20 This standard contains planetary protection requirements, including: - Planetary protection management requirements; - Technical planetary protection requirements for robotic and human missions (forward and backward contamination); - Planetary protection requirements related to procedures; - Document Requirements Descriptions (DRD) and their relation to the respective reviews. This standard may be tailored for the specific characteristic and constraints of a space project in conformance with ECSS-S-ST-00. Original English text of CSN EN Standard. The price of the Standard included all amendments and correcturs.