diff --git a/pyproject.toml b/pyproject.toml
index 458c3ec..9531bc2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "govoplan-core"
-version = "0.1.35"
+version = "0.1.36"
 description = "Reusable GovOPlaN platform core, access, tenancy, and RBAC components."
 readme = "README.md"
 requires-python = ">=3.12"
diff --git a/src/govoplan_core/core/datasources.py b/src/govoplan_core/core/datasources.py
index 2b65b1f..3a60be0 100644
--- a/src/govoplan_core/core/datasources.py
+++ b/src/govoplan_core/core/datasources.py
@@ -101,6 +101,8 @@ class DatasourceGovernance:
     transfer_agreement_ref: str | None = None
     freshness_policy: Mapping[str, object] = field(default_factory=dict)
     quality_policy: Mapping[str, object] = field(default_factory=dict)
+    approval_policy: Mapping[str, object] = field(default_factory=dict)
+    retention_policy: Mapping[str, object] = field(default_factory=dict)
     known_limits: tuple[str, ...] = ()
     correction_procedure_ref: str | None = None
     affected_refs: tuple[str, ...] = ()
@@ -179,6 +181,8 @@ class DatasourceGovernance:
             ),
             freshness_policy=_governance_mapping(source.get("freshness_policy")),
             quality_policy=_governance_mapping(source.get("quality_policy")),
+            approval_policy=_governance_mapping(source.get("approval_policy")),
+            retention_policy=_governance_mapping(source.get("retention_policy")),
             known_limits=_governance_texts(source.get("known_limits")),
             correction_procedure_ref=_optional_governance_text(
                 source.get("correction_procedure_ref")
@@ -210,6 +214,8 @@ class DatasourceGovernance:
             "transfer_agreement_ref": self.transfer_agreement_ref,
             "freshness_policy": dict(self.freshness_policy),
             "quality_policy": dict(self.quality_policy),
+            "approval_policy": dict(self.approval_policy),
+            "retention_policy": dict(self.retention_policy),
             "known_limits": list(self.known_limits),
             "correction_procedure_ref": self.correction_procedure_ref,
             "affected_refs": list(self.affected_refs),
@@ -289,6 +295,8 @@ class DatasourceMaterialization:
     frozen_label: str | None = None
     source_timestamp: datetime | None = None
     created_at: datetime | None = None
+    disposed_at: datetime | None = None
+    disposition: Mapping[str, object] = field(default_factory=dict)
     provenance: Mapping[str, object] = field(default_factory=dict)
     metadata: Mapping[str, object] = field(default_factory=dict)
     governance: DatasourceGovernance = field(default_factory=DatasourceGovernance)
@@ -309,6 +317,7 @@ class DatasourceStage:
     row_count: int | None = None
     byte_count: int | None = None
     validation: Mapping[str, object] = field(default_factory=dict)
+    approval: Mapping[str, object] = field(default_factory=dict)
     created_at: datetime | None = None
     promoted_at: datetime | None = None
     promoted_materialization_ref: str | None = None
diff --git a/tests/test_datasource_contract.py b/tests/test_datasource_contract.py
index 8013328..0ad89ea 100644
--- a/tests/test_datasource_contract.py
+++ b/tests/test_datasource_contract.py
@@ -13,6 +13,7 @@ from govoplan_core.core.datasources import (
     DatasourceArtifactBackendProvider,
     DatasourceDescriptor,
     DatasourceField,
+    DatasourceGovernance,
     DatasourceLifecycleProvider,
     DatasourceMaterialization,
     DatasourceOrigin,
@@ -212,6 +213,55 @@ class DatasourceContractTests(unittest.TestCase):
         self.assertEqual("upload", descriptor.kind)
         self.assertEqual("tabular", descriptor.shape)
 
+    def test_lifecycle_governance_round_trips_without_provider_specific_types(self) -> None:
+        governance = DatasourceGovernance.from_mapping(
+            {
+                "approval_policy": {
+                    "version": "approval-v2",
+                    "required": True,
+                    "required_approvals": 2,
+                },
+                "retention_policy": {
+                    "version": "retention-v3",
+                    "enabled": True,
+                    "stage_days": 30,
+                },
+            }
+        )
+
+        self.assertEqual("approval-v2", governance.approval_policy["version"])
+        self.assertEqual(30, governance.retention_policy["stage_days"])
+        self.assertEqual(
+            governance.approval_policy,
+            governance.to_dict()["approval_policy"],
+        )
+        self.assertEqual(
+            governance.retention_policy,
+            governance.to_dict()["retention_policy"],
+        )
+
+        stage = DatasourceStage(
+            ref="stage:governed",
+            name="Governed stage",
+            source_name="governed",
+            kind="upload",
+            mode="static",
+            shape="tabular",
+            state="awaiting_approval",
+            approval={"status": "pending", "policy_version": "approval-v2"},
+        )
+        materialization = DatasourceMaterialization(
+            ref="materialization:disposed",
+            datasource_ref="datasource:governed",
+            revision=1,
+            state="disposed",
+            fingerprint="abc123",
+            disposition={"reason": "retention_policy", "policy_version": "retention-v3"},
+        )
+
+        self.assertEqual("pending", stage.approval["status"])
+        self.assertEqual("retention_policy", materialization.disposition["reason"])
+
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/webui/package-lock.json b/webui/package-lock.json
index a0f848d..1c305f7 100644
--- a/webui/package-lock.json
+++ b/webui/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@govoplan/core-webui",
-  "version": "0.1.35",
+  "version": "0.1.36",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@govoplan/core-webui",
-      "version": "0.1.35",
+      "version": "0.1.36",
       "dependencies": {
         "@govoplan/access-webui": "file:../../govoplan-access/webui",
         "@govoplan/addresses-webui": "file:../../govoplan-addresses/webui",
diff --git a/webui/package-lock.release.json b/webui/package-lock.release.json
index daffdfb..eb066e1 100644
--- a/webui/package-lock.release.json
+++ b/webui/package-lock.release.json
@@ -1,12 +1,12 @@
 {
   "name": "@govoplan/core-webui",
-  "version": "0.1.35",
+  "version": "0.1.36",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@govoplan/core-webui",
-      "version": "0.1.35",
+      "version": "0.1.36",
       "dependencies": {
         "@govoplan/access-webui": "git+ssh://git@git.add-ideas.de/GovOPlaN/govoplan-access.git#v0.1.20",
         "@govoplan/admin-webui": "git+ssh://git@git.add-ideas.de/GovOPlaN/govoplan-admin.git#v0.1.19",
diff --git a/webui/package.json b/webui/package.json
index 126ca97..61da970 100644
--- a/webui/package.json
+++ b/webui/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@govoplan/core-webui",
-  "version": "0.1.35",
+  "version": "0.1.36",
   "private": true,
   "type": "module",
   "main": "src/index.ts",
diff --git a/webui/package.release.json b/webui/package.release.json
index 36b6e4a..26fc809 100644
--- a/webui/package.release.json
+++ b/webui/package.release.json
@@ -1,6 +1,6 @@
 {
   "name": "@govoplan/core-webui",
-  "version": "0.1.35",
+  "version": "0.1.36",
   "private": true,
   "type": "module",
   "main": "src/index.ts",