This legislative bill proposes amendments to allow public transit operators to conduct third-party testing for school bus drivers in Minnesota. The changes introduce new definitions and clarify the roles of various entities involved in school bus services. Specifically, the bill:

1. Defines "school bus service" as transportation services for students, either via school buses or public transportation.
2. Defines a "transit operator" as a provider of transit bus services.
3. Allows school districts and school bus companies, as third-party testers, to enter into agreements to test school bus drivers from other districts or companies. This testing could also extend to transit operators' employees who provide school bus services.
4. Specifies that these agreements need approval from a commissioner and that testers need to be certified and employed by school districts or school bus companies.

The bill essentially aims to streamline and expand the capability of school bus driver testing, potentially improving safety and compliance in student transportation.