In 2007, when Congress passed and President Bush signed the Energy Independence and Security Act (EISA), the renewable biofuels industry was in its infancy. Outside of corn ethanol, most pathways for the production of renewable fuels were still in development, and producers were operating in pre-commercial demonstration facilities. In order to account for this uncertainty in the timeline for moving from developing to proven technologies and processes, EISA provided EPA with the legislative authority to waive Renewable Fuel Standard (RFS) requirements under certain circumstances.