What constitutes compliant winter equipment for a Category B passenger vehicle in Bosnia and Herzegovina during the mandatory winter period?

1. Winter tires (M+S / 3PMSF) on all 4 wheels with minimum 4 mm tread depth, OR summer tires with minimum 4 mm tread depth plus properly sized snow chains in the vehicle
2. All-season tires with 1.6 mm tread depth without chains
3. Studded tires on the front driving axle only
4. Two winter tires on the drive axle and two summer tires with 2 mm tread on the other axle