The Clean Energy Standard [PDF] establishes two tiers of eligible renewable energy generators under the Renewable Energy Standard (RES).
Tier 1 comprises eligible generators and developers using biogas, biomass, biofuel, fuel cell, hydroelectric, solar, tidal/ocean, and wind as energy sources which entered commercial operation on or after January 1, 2015.
Tier 2 comprises run-of-river hydroelectric facilities (of 5 MWs or less), wind turbines, and certain biomass energy sources which entered commercial operation prior to January 1, 2003. Tier 2 RES resources are known as Maintenance Resources.
Email email@example.com with questions about RES Tier 1 and Tier 2 Eligibility.