allow at least the identification of the operator or group of operators including the list of the members, the category of products covered by the certificate and its period of validity;
beifear in ann ar a laghad an t-oibreoir nó an grúpa oibreoirí a shainaithint lena n-áirítear liosta na mball, catagóir na dtáirgí a chumhdaítear leis an deimhniú agus a thréimhse bailíochta;