In biofuels: energy sources that do not have an upper limit on the total quantity to be used. Such resources are renewable on a regular basis [Section 3(y), Biofuels Act of 2006; Section 4(ii), DA, DAR, DOE, DENR, DOF, DOLE, DOST, DTI, DOTC, NBB, NCIP, PCA, SRA JAO No. 2008-1, s. 2008, Guidelines Governing the Biofuel Feedstocks Production, and Biofuels and Biofuel Blends Production, Distribution and Sale under Republic Act No. 9367]
In biofuels: energy sources that do not have an upper limit on the total quantity to be used. Such resources are renewable on a regular basis, and whose renewal rate is relatively rapid to consider availability over an indefinite period of time [Section 3.1(ee), DOE Department Circular No. DC2007-05-0006, Rules and Regulations Implementing Republic Act No. 9367]
Note: The Biofuels Act of 2006 IRR adds a clause about the renewal rate. Cf. Renewable Energy Resources (RE Resources) under the RE Act of 2008. Section 4(uu) of the RE Act of 2008 (Section 3(zz) of the Rules and Regulations Implementing Republic Act No. 9513) provides the same definition for “Renewable Energy Resources (RE Resources)” and adds: “These include, among others, biomass, solar, wind, geothermal, ocean energy, and hydropower conforming with internationally accepted norms and standards on dams, and other emerging renewable energy technologies”.
Note: Under the above sources, the term is not written as “RE Sources”, which is added to this website for brevity.