diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index b25be2c9..2dca08df 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -165,7 +165,7 @@ jobs:
         uses: actions/checkout@v6
         with:
           repository: tweag/CIPs
-          ref: c92a3b5db78268e7f0db5f24c80ed6f49cf4b149
+          ref: 8c50312e7b28b947901d4675e496ee7840a44ef4
           path: cips
       - name: set env for reference CDDL
         run: |
diff --git a/flake.lock b/flake.lock
index 06ea2a99..437d116e 100644
--- a/flake.lock
+++ b/flake.lock
@@ -69,17 +69,17 @@
     "cips": {
       "flake": false,
       "locked": {
-        "lastModified": 1776254122,
-        "narHash": "sha256-MmXsGDMGnZayYZEt40Y5a54Pis31plBQt2/hbdUTaos=",
+        "lastModified": 1777282412,
+        "narHash": "sha256-FY8CN+7njCclT+3eOEKq5iTKogoGKEmuXkZqmjO+0oM=",
         "owner": "tweag",
         "repo": "CIPs",
-        "rev": "c92a3b5db78268e7f0db5f24c80ed6f49cf4b149",
+        "rev": "8c50312e7b28b947901d4675e496ee7840a44ef4",
         "type": "github"
       },
       "original": {
         "owner": "tweag",
         "repo": "CIPs",
-        "rev": "c92a3b5db78268e7f0db5f24c80ed6f49cf4b149",
+        "rev": "8c50312e7b28b947901d4675e496ee7840a44ef4",
         "type": "github"
       }
     },
diff --git a/flake.nix b/flake.nix
index ab2381f8..8ee3988f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,7 +18,7 @@
     inputs.nixpkgs.follows = "nixpkgs";
   };
   inputs.cips = {
-    url = "github:tweag/CIPs?rev=c92a3b5db78268e7f0db5f24c80ed6f49cf4b149";
+    url = "github:tweag/CIPs?rev=8c50312e7b28b947901d4675e496ee7840a44ef4";
     flake = false;
   };
   outputs = { self, nixpkgs, flake-utils, haskellNix, git-hooks, treefmt-nix
diff --git a/scls-cardano/cddl-src/Cardano/SCLS/CDDL.hs b/scls-cardano/cddl-src/Cardano/SCLS/CDDL.hs
index cec996b3..4f9d247e 100644
--- a/scls-cardano/cddl-src/Cardano/SCLS/CDDL.hs
+++ b/scls-cardano/cddl-src/Cardano/SCLS/CDDL.hs
@@ -10,6 +10,7 @@ module Cardano.SCLS.CDDL (
 
 import Cardano.SCLS.Namespace.Blocks qualified as Blocks
 import Cardano.SCLS.Namespace.EntitiesCommittee qualified as EntitiesCommittee
+import Cardano.SCLS.Namespace.EntitiesStakePools qualified as EntitiesStakePools
 import Cardano.SCLS.Namespace.GovCommittee qualified as GovCommittee
 import Cardano.SCLS.Namespace.GovConstitution qualified as GovConstitution
 import Cardano.SCLS.Namespace.GovPParams qualified as GovPParams
@@ -56,6 +57,9 @@ instance KnownSpec "nonces/v0" where
 instance KnownSpec "entities/committee/v0" where
   namespaceSpec _ = mkDefinition EntitiesCommittee.record_entry
 
+instance KnownSpec "entities/stake_pools/v0" where
+  namespaceSpec _ = mkDefinition EntitiesStakePools.record_entry
+
 instance KnownSpec "gov/committee/v0" where
   namespaceSpec _ = mkDefinition GovCommittee.record_entry
 
@@ -87,6 +91,7 @@ knownNamespaces =
   , mkNamespaceSymbol @"snapshots/go/v0"
   , mkNamespaceSymbol @"nonces/v0"
   , mkNamespaceSymbol @"entities/committee/v0"
+  , mkNamespaceSymbol @"entities/stake_pools/v0"
   , mkNamespaceSymbol @"gov/committee/v0"
   , mkNamespaceSymbol @"gov/constitution/v0"
   , mkNamespaceSymbol @"gov/pparams/v0"
@@ -101,6 +106,7 @@ type instance Spec.NamespaceKeySize "snapshots/mark/v0" = 31 -- 1 byte for hash
 type instance Spec.NamespaceKeySize "snapshots/set/v0" = 31 -- 1 byte for hash type, 29 bytes for key hash (including 1-byte discriminator/padding; cred 29, key 28+1), 1 byte for value type
 type instance Spec.NamespaceKeySize "snapshots/go/v0" = 31 -- 1 byte for hash type, 29 bytes for key hash (including 1-byte discriminator/padding; cred 29, key 28+1), 1 byte for value type
 type instance Spec.NamespaceKeySize "entities/committee/v0" = 8
+type instance Spec.NamespaceKeySize "entities/stake_pools/v0" = 28
 type instance Spec.NamespaceKeySize "gov/committee/v0" = 8
 type instance Spec.NamespaceKeySize "gov/constitution/v0" = 8
 type instance Spec.NamespaceKeySize "gov/pparams/v0" = 4
diff --git a/scls-cardano/cddl-src/Cardano/SCLS/Common.hs b/scls-cardano/cddl-src/Cardano/SCLS/Common.hs
index 8af80cfd..fae352af 100644
--- a/scls-cardano/cddl-src/Cardano/SCLS/Common.hs
+++ b/scls-cardano/cddl-src/Cardano/SCLS/Common.hs
@@ -248,3 +248,27 @@ gov_action_id :: Rule
 gov_action_id =
   "gov_action_id"
     =:= arr ["transaction_id" ==> hash32, "gov_action_index" ==> VUInt `sized` (2 :: Word64)]
+
+staking_keyhash :: Rule
+staking_keyhash = "staking_keyhash" =:= hash28
+
+account_id :: Rule
+account_id = "account_id" =:= credential
+
+relay :: Rule
+relay =
+  "relay"
+    =:= arr
+      [ 0
+      , a (port / VNil)
+      , a (ipv4 / VNil)
+      , a (ipv6 / VNil)
+      ]
+    / arr [1, a (port / VNil), a dns_name]
+    / arr [2, a dns_name]
+
+pool_metadata :: Rule
+pool_metadata =
+  "pool_metadata"
+    =:= arr
+      [a url, a VBytes]
diff --git a/scls-cardano/cddl-src/Cardano/SCLS/Namespace/EntitiesStakePools.hs b/scls-cardano/cddl-src/Cardano/SCLS/Namespace/EntitiesStakePools.hs
new file mode 100644
index 00000000..33924dc6
--- /dev/null
+++ b/scls-cardano/cddl-src/Cardano/SCLS/Namespace/EntitiesStakePools.hs
@@ -0,0 +1,77 @@
+{-# LANGUAGE ImportQualifiedPost #-}
+{-# LANGUAGE OverloadedLists #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE QuasiQuotes #-}
+{-# LANGUAGE TypeApplications #-}
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# OPTIONS_GHC -Wno-unrecognised-pragmas #-}
+
+{-# HLINT ignore "Use camelCase" #-}
+module Cardano.SCLS.Namespace.EntitiesStakePools where
+
+import Cardano.SCLS.Common
+import Codec.CBOR.Cuddle.Huddle
+import Data.Function (($))
+import Text.Heredoc (str)
+
+record_entry :: Rule
+record_entry =
+  comment
+    [str| The key for the namespace
+        |
+        | ```
+        | meta:
+        |   endian: be
+        |
+        | seq:
+        |   - id: key
+        |     type: keyhash
+        |
+        | types:
+        |   keyhash:
+        |     seq:
+        |       - id: keyhash_data
+        |         size: 28
+        | ```
+        |]
+    $ "record_entry" =:= stake_pool
+
+stake_pool :: Rule
+stake_pool =
+  "stake_pool"
+    =:= mp
+      [ "stake_pool_state" ==> stake_pool_state / VNil
+      , "retiring_epoch_no" ==> epoch_no / VNil
+      , "future_stake_pool_params" ==> stake_pool_params / VNil
+      ]
+
+stake_pool_state :: Rule
+stake_pool_state =
+  "stake_pool_state"
+    =:= mp
+      [ "vrf" ==> vrf_keyhash
+      , "cost" ==> coin
+      , "margin" ==> unit_interval
+      , "owners" ==> set staking_keyhash
+      , "pledge" ==> coin
+      , "relays" ==> arr [0 <+ a relay]
+      , "deposit" ==> coin
+      , "metadata" ==> pool_metadata / VNil
+      , "account_id" ==> account_id
+      , "delegators" ==> set credential
+      ]
+
+stake_pool_params :: Rule
+stake_pool_params =
+  "stake_pool_params"
+    =:= mp
+      [ "id" ==> pool_keyhash
+      , "vrf" ==> vrf_keyhash
+      , "cost" ==> coin
+      , "margin" ==> unit_interval
+      , "owners" ==> set staking_keyhash
+      , "pledge" ==> coin
+      , "relays" ==> arr [0 <+ a relay]
+      , "metadata" ==> pool_metadata / VNil
+      , "account_address" ==> address
+      ]
diff --git a/scls-cardano/scls-cardano.cabal b/scls-cardano/scls-cardano.cabal
index 74dd7613..fcb6bdaf 100644
--- a/scls-cardano/scls-cardano.cabal
+++ b/scls-cardano/scls-cardano.cabal
@@ -32,6 +32,7 @@ library
     Cardano.SCLS.Common
     Cardano.SCLS.Namespace.Blocks
     Cardano.SCLS.Namespace.EntitiesCommittee
+    Cardano.SCLS.Namespace.EntitiesStakePools
     Cardano.SCLS.Namespace.GovCommittee
     Cardano.SCLS.Namespace.GovConstitution
     Cardano.SCLS.Namespace.GovPParams
diff --git a/scls-cardano/test/Reference.hs b/scls-cardano/test/Reference.hs
index 65bcaed1..79f070d4 100644
--- a/scls-cardano/test/Reference.hs
+++ b/scls-cardano/test/Reference.hs
@@ -70,6 +70,7 @@ allReferenceCDDLs =
   , ("snapshots/go/v0", "snapshots_go_v0.cddl")
   , ("nonces/v0", "nonces_v0.cddl")
   , ("entities/committee/v0", "entities_committee_v0.cddl")
+  , ("entities/stake_pools/v0", "entities_stake_pools_v0.cddl")
   , ("gov/committee/v0", "gov_committee_v0.cddl")
   , ("gov/constitution/v0", "gov_constitution_v0.cddl")
   , ("gov/pparams/v0", "gov_pparams_v0.cddl")
diff --git a/scls-cardano/testlib/Cardano/SCLS/Testlib.hs b/scls-cardano/testlib/Cardano/SCLS/Testlib.hs
index d22ca020..6af173d5 100644
--- a/scls-cardano/testlib/Cardano/SCLS/Testlib.hs
+++ b/scls-cardano/testlib/Cardano/SCLS/Testlib.hs
@@ -56,6 +56,7 @@ testAllNS ::
   , ConstrNS "snapshots/mark/v0"
   , ConstrNS "snapshots/set/v0"
   , ConstrNS "entities/committee/v0"
+  , ConstrNS "entities/stake_pools/v0"
   , ConstrNS "gov/committee/v0"
   , ConstrNS "gov/constitution/v0"
   , ConstrNS "gov/pparams/v0"
@@ -70,6 +71,7 @@ testAllNS = describe "scls/conformance" $ do
   testNS @"snapshots/mark/v0"
   testNS @"snapshots/set/v0"
   testNS @"entities/committee/v0"
+  testNS @"entities/stake_pools/v0"
   testNS @"gov/committee/v0"
   testNS @"gov/constitution/v0"
   testNS @"gov/pparams/v0"