In Saskatchewan, what is the maximum permissible weight for a steering axle on a Class 1 vehicle, and what determines this limit?

1. 5,500 kg maximum, determined solely by the vehicle's engine size
2. 5,500 kg (or up to 7,250 kg under specific conditions), determined by the lesser of the tire manufacturer's load rating, the axle rating, or provincial regulations
3. Exactly 10,000 kg, determined by the trailer's length
4. 9,100 kg, determined by the number of drive axles