[en] The paper promotes the system previously outlined for the protection of the environment from ionising radiation and the framework that is necessary to make it work. Key components include the assessment of the environmental transfer of radionuclides and uptake of radionuclides by organisms, the adaptation of dosimetric models to calculate absorbed doses and studies concerning dose-effects relationships for selected organisms. The proposed framework will also make use of 'reference' organisms, selection of which will be based on a number of criteria, e.g. radiosensitivity, ubiquity, and will involve the development of standardised exposure units for biota which should integrate the Relative Biological Effectiveness (RBE) of the radiation under consideration. (author)