In biofuels: lands serviced by natural irrigation or irrigation facilities. These include lands where water is not readily available as existing irrigation facilities need rehabilitation or upgrading or where irrigation water is not available year-round [Section 4(y), 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]