What threw me was this line:
Foreigners under recent investigation include “some with ties to extremist groups” who have been able to “purchase buses and acquire licenses,” the bulletin says.
So why would they purchase buses? Purchase buses and then bid on a contract (if school bus service is actually contracted out anywhere). As I say, where I grew up the school district owned the buses -- and yes, if they hired you as a driver, you got the bus, route, kids, etc.
The second possibility is a counterfeit bus.
A third possibility -- to give themselves a cover as to why they're acquiring the license?