As part of the risk retirement process, OES-Environmental has developed "evidence bases" for several key stressors. These stressors were chosen because they are considered to present relatively low risk to marine animals and the environment, and could potentially be retired. The evidence bases are lists of key research papers and monitoring reports for each stressor that support risk retirement for small numbers of MRE devices. The evidence bases have been reviewed by international subject matter experts at conferences and online workshops as part of OES-Environmental's outreach and engagement strategy.