There are three levels of the EIA Register: Associate, Registered and Principal:
Associate
You are likely to be either a 'trainee' EIA assessor or a specialist contributing to EIA projects. Alternatively, you could be a senior member of staff in an organisation who cannot meet the currently practising work experience requirements. As a minimum, you will be expected to have a basic understanding of EIA methods, environmental impacts and EIA legislation.
Registered
You will be actively involved in EIA on a day-to-day basis either as an EIA 'generalist' or specialist providing impact assessment studies. As a minimum, you will be expected to have a good appreciation of a range of environmental impacts and assessment techniques, be competent in the areas in which you operate and have some EIA project management experience.
Principal
You will be a very experienced and senior EIA professional with a wealth of EIA expertise and experience, an excellent appreciation of a wide range of impact assessments and the issues pertaining to EIA. You will also be expected to have led, managed and directed large EIA teams and have experience of liaising with senior management.