The indicator measures to which extent the states provide broad interpretation of standing in proceedings concerned with environmental matters with a view to achieving effective access to justice.

This indicator is an arithmetic average of expert answers to questions on a scale from 0 (worst) to 3 (best): (18.1) To what extent does the law recognize broad legal standing in proceedings concerned with environmental matters?; (P18.1) In the last 5 years, have NGOs been granted legal standing by national courts in public interest environmental cases?