Property adviser Jones Lang LaSalle (JLL) has warned that the introduction of Energy Performance Certificates (EPC) in Scotland next January could be highly problematic. From that date all commercial buildings over 50 m[sup]2[/sup] will be required to have an EPC when they are let or sold. For new buildings the same requirement dates from May 2007. Introduced under the EU's Energy Performance of Buildings Directive the certificates are designed to reduce carbon emissions by having independent assessors determine a building’s energy efficiency and providing recommendations on increasing it.