How does Article 133 of Bahrain's Traffic Law Implementing Regulation express the roadworthiness standard for a heavy vehicle's tyres?

1. It sets a single numeric tread depth in millimetres for every axle
2. It requires pneumatic rubber tyres in good condition that do not allow the vehicle to skid, matched to the vehicle's design, axles and rims, and able to carry its maximum weight
3. It requires tyres to be replaced every twelve months regardless of condition
4. It leaves tyre condition entirely to the operator's discretion