“Eligible entity” or “entity” means:
1. A local government, which includes, without limitation, any county, city, district, agency, regional transportation commission, school district or other political subdivision of this State;
2. A state agency that operates a medium-duty or heavy-duty vehicle or a fleet of medium-duty or heavy-duty vehicles;
3. A nonprofit organization;
4. A commercial entity that owns a medium-duty or heavy-duty vehicle or a fleet of medium-duty or heavy-duty vehicles; or
5. An independent truck operator.