This American National Standard builds upon the success of Recommended Practice No. SNT-TC-1A by providing comprehensive minimum requirements for personnel certification. Included are requirements for NDT instructors and employer certification of Level I, II, and III personnel. It includes a requirement for the ASNT NDT Level III certification of Level III personnel. This standard has been approved by the American National Standards Institute (ANSI). Now sold individually, it is recommended that this product be purchased with ANSI/ASNT CP-105: ASNT Standard Topical Outlines for Qualification of Nondestructive Testing Personnel (2020).