(30)This Directive does not regulate contract law issues related to the validity of credit agreements. Therefore, in that area, the Member States may maintain or introduce national provisions which are in conformity with Community law. Member States may regulate the legal regime governing the offer to conclude the credit agreement, in particular when it is to be given and the period during which it is to be binding on the creditor. If such an offer is made at the same time as the pre-contractual information provided for by this Directive is given, it should, like any additional information the creditor may wish to give to the consumer, be provided in a separate document which may be annexed to the Standard European Consumer Credit Information.