Tyrewise Stewardship Fee

I was just browsing through TM help info and suddenly found info on tyrewise stewardship fee, which as I understand is a levy on tyres to help process them at end of life. I had never heard of it before ( never sold tyres) and according to TM it must be mentioned in all tyre listings that this includes the stewardship fee in the price. So I looked through lots of tyre listings and only found one listing with this. If TM demand this, then why dont they  1/ state in the tyre listing process that this is required , and 2/ enforce it. Im sure hardly anybody listing tyres knows about this obscure policy, so why does TM hide this in the bowels of historical annoncements