diff --git a/package.json b/package.json
index a3036dd..4ac6835 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "read-excel-file": "9.2.0"
   },
   "peerDependencies": {
-    "@govoplan/core-webui": "^0.1.8",
+    "@govoplan/core-webui": "^0.1.9",
     "lucide-react": "^1.23.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
diff --git a/webui/package.json b/webui/package.json
index 14eb937..4615ea4 100644
--- a/webui/package.json
+++ b/webui/package.json
@@ -17,7 +17,7 @@
     "read-excel-file": "9.2.0"
   },
   "peerDependencies": {
-    "@govoplan/core-webui": "^0.1.8",
+    "@govoplan/core-webui": "^0.1.9",
     "lucide-react": "^1.23.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
diff --git a/webui/src/api/campaigns.ts b/webui/src/api/campaigns.ts
index e7783cb..a5b982e 100644
--- a/webui/src/api/campaigns.ts
+++ b/webui/src/api/campaigns.ts
@@ -1,5 +1,11 @@
 import type { ApiSettings, CampaignListItem, DeltaDeletedItem } from "../types";
 import { apiDownload, apiFetch } from "./client";
+export { fetchResourceAccessExplanation } from "@govoplan/core-webui";
+export type {
+  AccessDecisionProvenanceItem,
+  ResourceAccessExplanationUser as AccessExplanationUser,
+  ResourceAccessExplanationResponse
+} from "@govoplan/core-webui";
 
 export type CampaignListResponse =
 CampaignListItem[] |
@@ -22,27 +28,6 @@ export type CampaignShare = {
 
 export type CampaignShareTarget = {id: string;name: string;secondary?: string | null;};
 export type CampaignShareTargets = {users: CampaignShareTarget[];groups: CampaignShareTarget[];};
-export type AccessExplanationUser = {
-  id: string;
-  account_id?: string | null;
-  email?: string | null;
-  display_name?: string | null;
-};
-export type AccessDecisionProvenanceItem = {
-  kind: string;
-  id?: string | null;
-  label?: string | null;
-  tenant_id?: string | null;
-  source?: string | null;
-  details?: Record<string, unknown>;
-};
-export type ResourceAccessExplanationResponse = {
-  user: AccessExplanationUser;
-  resource_type: string;
-  resource_id: string;
-  action: string;
-  provenance: AccessDecisionProvenanceItem[];
-};
 
 export type CampaignUpdatePayload = {
   external_id?: string | null;
@@ -995,20 +980,6 @@ export async function getCampaignShareTargets(settings: ApiSettings, campaignId:
   return apiFetch<CampaignShareTargets>(settings, `/api/v1/campaigns/${campaignId}/share-targets`);
 }
 
-export function fetchResourceAccessExplanation(
-settings: ApiSettings,
-options: {userId: string;resourceType: string;resourceId: string;action: string;tenantId?: string | null;})
-: Promise<ResourceAccessExplanationResponse> {
-  const params = new URLSearchParams({
-    user_id: options.userId,
-    resource_type: options.resourceType,
-    resource_id: options.resourceId,
-    action: options.action
-  });
-  if (options.tenantId) params.set("tenant_id", options.tenantId);
-  return apiFetch<ResourceAccessExplanationResponse>(settings, `/api/v1/admin/access/resource-explanation?${params.toString()}`);
-}
-
 export async function getCampaignShares(settings: ApiSettings, campaignId: string): Promise<CampaignShare[]> {
   const response = await apiFetch<{shares: CampaignShare[];}>(settings, `/api/v1/campaigns/${campaignId}/shares`);
   return response.shares;
diff --git a/webui/src/features/campaigns/components/CampaignAccessCard.tsx b/webui/src/features/campaigns/components/CampaignAccessCard.tsx
index 74933cc..df1d541 100644
--- a/webui/src/features/campaigns/components/CampaignAccessCard.tsx
+++ b/webui/src/features/campaigns/components/CampaignAccessCard.tsx
@@ -12,7 +12,7 @@ import {
   type CampaignShareTargets,
   type ResourceAccessExplanationResponse } from
 "../../../api/campaigns";
-import { Button } from "@govoplan/core-webui";
+import { Button, ResourceAccessExplanation } from "@govoplan/core-webui";
 import { Card } from "@govoplan/core-webui";
 import { ConfirmDialog } from "@govoplan/core-webui";
 import DataGrid, { type DataGridColumn } from "../../../components/table/DataGrid";
@@ -221,76 +221,11 @@ export default function CampaignAccessCard({
         <FormField label="i18n:govoplan-campaign.access.2f81a22d"><select value={sharePermission} onChange={(event) => setSharePermission(event.target.value as "read" | "write")}><option value="read">i18n:govoplan-campaign.can_view.1b3e4006</option><option value="write">i18n:govoplan-campaign.can_edit_and_operate.77acb15e</option></select></FormField>
       </Dialog>
 
-      <Dialog open={accessExplanationOpen} className="campaign-access-dialog" title="i18n:govoplan-campaign.access_explanation.75ee7f62" onClose={() => { if (!accessExplanationLoading) { setAccessExplanationOpen(false); setAccessExplanation(null); } }} footer={<Button onClick={() => { setAccessExplanationOpen(false); setAccessExplanation(null); }} disabled={accessExplanationLoading}>i18n:govoplan-campaign.close.bbfa773e</Button>}>
-        <ResourceAccessExplanationContent loading={accessExplanationLoading} explanation={accessExplanation} fallbackResourceLabel={campaign.name || campaign.external_id || campaign.id} />
+      <Dialog open={accessExplanationOpen} className="campaign-access-dialog" title="i18n:govoplan-core.access_explanation.75ee7f62" onClose={() => { if (!accessExplanationLoading) { setAccessExplanationOpen(false); setAccessExplanation(null); } }} footer={<Button onClick={() => { setAccessExplanationOpen(false); setAccessExplanation(null); }} disabled={accessExplanationLoading}>i18n:govoplan-campaign.close.bbfa773e</Button>}>
+        <ResourceAccessExplanation loading={accessExplanationLoading} explanation={accessExplanation} fallbackResourceLabel={campaign.name || campaign.external_id || campaign.id} />
       </Dialog>
 
       <ConfirmDialog open={Boolean(revokeTarget)} title="i18n:govoplan-campaign.remove_campaign_share.2c2d42eb" message="i18n:govoplan-campaign.remove_this_user_s_or_group_s_explicit_access_to.5ff07672" confirmLabel="i18n:govoplan-campaign.remove_share.69c932e1" tone="danger" busy={busy} onCancel={() => setRevokeTarget(null)} onConfirm={() => void revoke()} />
     </>);
 
 }
-
-function ResourceAccessExplanationContent({
-  loading,
-  explanation,
-  fallbackResourceLabel
-}: {loading: boolean;explanation: ResourceAccessExplanationResponse | null;fallbackResourceLabel: string;}) {
-  if (loading) return <p className="muted small-note">i18n:govoplan-campaign.loading_access_explanation.04a7c934</p>;
-  if (!explanation) return null;
-  const userLabel = explanation.user.display_name || explanation.user.email || explanation.user.id;
-  const resourceLabel = explanation.provenance.find((item) => item.kind === "resource")?.label || fallbackResourceLabel || explanation.resource_id;
-  return (
-    <>
-      <div className="form-grid compact responsive-form-grid">
-        <div><span className="form-label">i18n:govoplan-campaign.user.9f8a2389</span><p>{userLabel}</p></div>
-        <div><span className="form-label">i18n:govoplan-campaign.resource.d1c626a9</span><p>{resourceLabel}</p></div>
-        <div><span className="form-label">i18n:govoplan-campaign.action.97c89a4d</span><p><code>{explanation.action}</code></p></div>
-        <div><span className="form-label">i18n:govoplan-campaign.evidence.8487d192</span><p>{explanation.provenance.length}</p></div>
-      </div>
-      {explanation.provenance.length === 0 ?
-      <p className="muted small-note">i18n:govoplan-campaign.no_access_evidence_was_returned.84a21e4e</p> :
-      <div className="admin-assignment-grid">
-          {explanation.provenance.map((item, index) =>
-        <div key={`${item.kind}:${item.id ?? index}`}>
-              <strong>{provenanceKindLabel(item.kind)}</strong>
-              <div className="muted small-note">
-                {item.source || "i18n:govoplan-campaign.no_source.6dcf9723"}
-                {item.id && <> · <code>{item.id}</code></>}
-              </div>
-              {item.label && <p>{item.label}</p>}
-              {Object.keys(item.details ?? {}).length > 0 && <p className="muted small-note">{formatProvenanceDetails(item.details ?? {})}</p>}
-            </div>
-        )}
-        </div>
-      }
-    </>);
-}
-
-function provenanceKindLabel(kind: string): string {
-  switch (kind) {
-    case "resource":
-      return "i18n:govoplan-campaign.resource.d1c626a9";
-    case "owner":
-      return "i18n:govoplan-campaign.owner.89ff3122";
-    case "share":
-      return "i18n:govoplan-campaign.share.09ca55ca";
-    case "policy":
-      return "i18n:govoplan-campaign.policy.0b779a05";
-    case "role":
-      return "i18n:govoplan-campaign.role.b5b4a5a2";
-    case "right":
-      return "i18n:govoplan-campaign.permission.2f81a22d";
-    default:
-      return kind;
-  }
-}
-
-function formatProvenanceDetails(details: Record<string, unknown>): string {
-  return Object.entries(details).map(([key, value]) => `${key}: ${formatProvenanceValue(value)}`).join("; ");
-}
-
-function formatProvenanceValue(value: unknown): string {
-  if (value === null || value === undefined) return "i18n:govoplan-campaign.none.6eef6648";
-  if (typeof value === "string" || typeof value === "number" || typeof value === "boolean") return String(value);
-  return JSON.stringify(value);
-}