For Public Elementary & Secondary Schools: DepEd Requirements for the Issuance of School Site Special Patent in Accordance with the Department of Environment & Natural Resporces (DENR) Posted on June 9, 2015 by MSM13 Leave a comment 1862. DepEd Requirements for the Issuance of School Site Special Patent in Accordance with the Department of Environment & Natural Resporces (DENR) Memorandum