Planetary Protection is the practice of protecting solar system bodies from contamination by Earth life and protecting Earth from possible life forms that may be returned from other solar system bodies. NASA’s Office of Planetary Protection promotes the responsible exploration of the solar system by implementing and developing efforts that protect the science, explored environments and Earth.
Because of the Outer Space Treaty, commercial organisations based in the USA have to follow NASA's Planetary Protection guidelines.
What about other authorities in other countries?
This year China and the United Arab Emirates both launched missions to mars, and ESA and Roscosmos also occasionally send probes to mars.
Do these agencies/organisations follow NASA Planetary Protection rules?
Do they have their own different set of rules to avoid contaminating other worlds?
Or do they fully ignore these precautions?