Law no. 25,019 was adopted in November 1998, with implementing provisions initiated in December 1999, in order to regulate both wind and solar energy.
The law introduced for the first time national-level assistance to the amount of EUR cents 0.23 kWh (0.01 arg$/kWh) for wind energy. This subsidy was paid in addition to revenues from the sale of energy for the following 15 years. The law also prescribed tax incentives in the form of stretched-out remittance of value-added tax. It became generally accepted that the national law on the promotion of renewable energies did not offer sufficient incentives and therefore needed to be expanded, leading to the Law on the promotion of power generation from renewable energy sources being passed on 6 December 2006.