i. Provisional members are member companies that have not yet furnished a valid Towing Safety Management System (TSMS) Certificate, Letter of Compliance, or comparable instrument issued by their Coast Guard-approved Third Party Organization (TPO).

ii. Certified members are member companies that have furnished a valid TSMS Certificate, Letter of Compliance, or comparable instrument certifying compliance with an SMS that meets the minimum requirements of 46 CFR Subchapter M Part 138, issued by their Coast Guard-approved TPO.