The EPA is proposing changes to Method 303 to better define the requirements associated with conducting Method 303 certification courses. Method 303 is an air pollution test method used to determine the visible emissions from coke ovens. This action adds additional language that clarifies the criteria used by the EPA to determine the competency of training providers, but does not change the requirements for conducting the test method. These changes will help entities interested in conducting training classes to better understand the requirements necessary to be approved to conduct these training courses.