caiso notification operations procedure e 511 attachments c posting affected party review market participants please assure notification forwarded respective operating departments notification operating procedure update following new revised iso operating procedures implemented posted reference iso website iso operating procedure posted e 511 load reduction programs attachments c please note attachments b e f g h posted security reasons version 4 2 effective date 8 2 2001 procedure purpose operating procedure describes load reduction programs available iso includes four programs discretionary load curtailment program dlcp voluntary load curtailment program vlcp udc interruptible service program demand relief program drp changes reasons see attached please find http wwwl caiso com thegrid operations opsdoc index html appropriate operating procedure section heading questions please e mail procedure control desk mailbox mailto procctrldesk caiso com respond soon possible thank operations support training