tokens: The project shall establish the radiation protection limits to be applied to the mission . NOTE These limits are established based on the policies and standards defined by the space agency for manned space flight ( see ECSS - E - HB-10 - 12 Section 10.4 , and ECSS - E - ST-10 - 11 ) . Where there is more than one space agency involved , the radiation protection limits to be adopted by the project are normally agreed through consensus ( e.g. through a working group of radiation effects experts from the different partner agencies ) .