This regulation (Law 54/1997) of the electric sector liberalised the electricity sector and guaranteed electricity supply at lowest possible cost. It elaborated the plan for the promotion of renewable energy and the plan for achieving the goal of 12% of primary energy consumption from renewable sources by 2010. The law also established a special regime for producers, which are not allowed to surpass a maximum of 50 MW power. This law is implemented through royal decrees, most notably Decree 2818/1998, which specified the feed-in tariffs from which the generating plants under the "special regime" may benefit. The law established the guarantee of access to the grid for producers under the special regime. The law also established a premium, so that the price of electricity sold under the special regime is 80-90% of the mean price of electricity charged to final consumers.