The forest certification systems FSC® and PEFC™ are established in the countries around the Baltic Sea. Basically, international standards are applied. Representatives of the forestry industry, environmental organisations, trade unions and other interest groups affected by forest management in each country have reached agreement on a national standard. The national standard encompasses criteria (relatively detailed) which govern how forest management is conducted. Verification that forest management complies with the criteria is carried out in the field by external auditors.