the decision prompted nevada solar groups and the nevada attorney general's bureau of consumer protection to intervene and challenge the puc's decision based on the fact "it violated the contract clause of the constitution because many rooftop solar contracts were predicated on retail rate net metering." under the terms of the new agreement, 32,000 rooftop solar customers will be grandfathered in under the original retail net metering rates over a period of 20 years. these customers applied or installed a rooftop solar system before december 31, 2015. "the agreement also makes eligible customers who withdrew an application, or had a renewablegenerations application expire between december 23 and december 31, 2015, for the more favorable rates."