Where does Schedule 5 say you have to throw servicable tyres away ?
My understanding is that the LAME inspects the tyres, if they are serviceable - i.e within manufacturers limits for use then they can remain in service.
In this case it is possible that tyres may be worn to a point that they only last a few Hrs beyond his inspection, but they can stay on the aircraf
In GA the responsibility then falls on the Registered Owner/Operator and Pilots daily inspections to pick find and take action if the tyres wear out and require replacing during the period the maintenance release is in force.
Unforunatly many Registered Owners/Operators during the validity of their Mainteance Release will ignore the now worn out tyre untill the next inspection. Whose fault is that ?