The Seal’s producer has to follow these rules:

-Keep a careful registration of all logos and consecutive numberings to avoid duplicates in order to provide any required information -Produce a seal which is strong enought to resist accidental breakage -Endorse the seals with his name as producer, in order to be able to easily identify his production and thecustomer to whom it has been sold and … ...protect the number ID along with the numberof the mechanic seal