The REB exemptions for renewables were partially phased out in 2004 and totally in 2005. The MEP feed-in tariff scheme was planned to replace the REB facilities. The production subsidy for renewables in the REB was phased out on the same date that the MEP scheme was started (1 July 2003). As of 2002, small-scale hydro was no longer eligible. Since 2001, a Green Certificate System has been used for the validation and monitoring of the production and sales of green electricity under the REB. The energy tax exemption applies only to renewable electricity possessing a green certificate. With this tax level, in 2007, green electricity was on average as expensive as regular electricity.