When there is a prolongation of the validity date it is always a renewal. When the validity date remains the same but there are some changes in the certificate (e.g. new area or type of operation, new name) then it is an amendment.
When there is a prolongation of the validity date it is always a renewal. When the validity date remains the same but there are some changes in the certificate (e.g. new area or type of operation, new name) then it is an amendment.