Tyre age is covered in section 5.2.3. of the MoT Inspection Manual and only applies to vehicles with more than 8 passenger seats, other than vehicles of a historical interest. Tyres over ten years old at the time of the test must be failed if they are on any steered axle or any rear axle of a minibus with a single wheel fitment. Date codes are only required to be marked on one side of the tyre, so if the code is not visible the tester should advise the presenter and assume the date code is present and the age acceptable.