In May 2008, the Ministry of Economy and Foreign Trade launched a partnership agreement to include the financial sector in supporting improved energy efficiency in the building sector. Under the agreement, participating banks will offer reduced interest rates on loans financing the construction of passive houses (those with class A energy performance certificates) or low-energy consumption houses (those with class B energy performance certificates). The reduction offered must be at least equivalent to a reduction of 0.125% on the interest rate granted for the full duration of the loan. Participating banks are awarded the status of Energy Efficient Partner, and can use the Energy Efficient Partner logo on all their communication supports. The agreement has been signed by four banks, Dexia, Fortis, ING and Raiffeisen.