The Task Force jurisdictions conduct or participate in drills and exercises to evaluate industry spill response plans and provide recommendations to assist industry in ensuring their response plans are adequate and effective. Requirements for drills and exercises vary by jurisdiction, and this can pose challenges when one response plan is being evaluated in several jurisdictions. To address the variability in drill objectives and requirements, the Task Force convened a workgroup in 2018 to compare evaluation criteria across the Task Force jurisdictions; developed common, cross-jurisdictional requirements; and began sharing information on the outcome of drills and exercises through regular workgroup conference calls. The workgroup meets quarterly to share outcomes and lessons learned from drills and exercises taking place among the member jurisdictions.