diff --git a/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshLiveProviderTransport.cs b/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshLiveProviderTransport.cs
index ae746ec..d6960c5 100644
--- a/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshLiveProviderTransport.cs
+++ b/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshLiveProviderTransport.cs
@@ -1601,7 +1601,8 @@ namespace GameCult.Eve.UnityScene
                         receipt.Navigation.ProviderId,
                         receipt.Navigation.SurfaceId,
                         receipt.Navigation.SurfaceKind,
-                        receipt.Navigation.RendezvousEndpoints)));
+                        receipt.Navigation.RendezvousEndpoints,
+                        receipt.Navigation.AuthorityRuntimeId)));
         }
 
         private sealed class ReceiptSubscription : IDisposable
diff --git a/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshPlayableWorldProvider.cs b/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshPlayableWorldProvider.cs
index cee9cc2..fdc20d6 100644
--- a/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshPlayableWorldProvider.cs
+++ b/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshPlayableWorldProvider.cs
@@ -170,6 +170,7 @@ namespace GameCult.Eve.UnityScene
                 target.SurfaceId,
                 requiredSurfaceKind,
                 target.VerseId,
+                target.AuthorityRuntimeId,
                 _navigationAuthorityTrust,
                 CancellationToken.None).ConfigureAwait(false);
 
@@ -352,6 +353,7 @@ namespace GameCult.Eve.UnityScene
                 surfaceFilter,
                 surfaceKind,
                 verseFilter,
+                "",
                 _authorityTrust,
                 cancellationToken).ConfigureAwait(false);
             TraceStartup($"discovery and transport preparation {elapsed.Elapsed.TotalMilliseconds:0.###}ms");
@@ -364,6 +366,7 @@ namespace GameCult.Eve.UnityScene
             string requiredSurfaceId,
             string requiredSurfaceKind,
             string requiredVerseId,
+            string requiredAuthorityRuntimeId,
             CultMeshAuthorityTrustPolicy trust,
             CancellationToken cancellationToken)
         {
@@ -379,7 +382,8 @@ namespace GameCult.Eve.UnityScene
                         requiredSurfaceId,
                         requiredSurfaceKind,
                         requiredVerseId,
-                        cancellationToken).ConfigureAwait(false);
+                        cancellationToken,
+                        requiredAuthorityRuntimeId).ConfigureAwait(false);
                     var resolvedCachePath = string.IsNullOrWhiteSpace(cacheDirectory)
                         ? Path.Combine(Application.temporaryCachePath, $"eve-unity-{GetInstanceID()}")
                         : cacheDirectory;
diff --git a/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshProviderDiscovery.cs b/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshProviderDiscovery.cs
index fd43418..7772dbc 100644
--- a/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshProviderDiscovery.cs
+++ b/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshProviderDiscovery.cs
@@ -53,7 +53,8 @@ namespace GameCult.Eve.UnityScene
             string surfaceId = "",
             string surfaceKind = "interactive-world",
             string verseId = "",
-            CancellationToken cancellationToken = default)
+            CancellationToken cancellationToken = default,
+            string requiredAuthorityRuntimeId = "")
         {
             if (string.IsNullOrWhiteSpace(rendezvousEndpoint))
                 throw new ArgumentException("Rendezvous endpoint must be non-empty.", nameof(rendezvousEndpoint));
@@ -101,10 +102,9 @@ namespace GameCult.Eve.UnityScene
             });
             foreach (var candidate in candidates)
             {
-                foreach (var authorityRuntimeId in (candidate.AuthorityRuntimeIds ?? Array.Empty<string>())
-                    .Where(id => !string.IsNullOrWhiteSpace(id))
-                    .Distinct(StringComparer.Ordinal)
-                    .OrderBy(id => id, StringComparer.Ordinal))
+                foreach (var authorityRuntimeId in EligibleAuthorityRuntimeIds(
+                    candidate.AuthorityRuntimeIds,
+                    requiredAuthorityRuntimeId))
                 {
                     try
                     {
@@ -146,11 +146,22 @@ namespace GameCult.Eve.UnityScene
                 }
             }
 
-            var filter = $"provider='{providerId}', surface='{surfaceId}', kind='{surfaceKind}'";
+            var filter = $"provider='{providerId}', surface='{surfaceId}', kind='{surfaceKind}', authority='{requiredAuthorityRuntimeId}'";
             var detail = failures.Count == 0 ? "" : $" Endpoint failures: {string.Join(" | ", failures)}";
             var observedDetail = observed.Count == 0 ? "" : $" Observed: {string.Join(" | ", observed)}";
             throw new InvalidOperationException($"No advertised Eve surface matched {filter}.{detail}{observedDetail}");
         }
 
+        internal static IReadOnlyList<string> EligibleAuthorityRuntimeIds(
+            IEnumerable<string>? authorityRuntimeIds,
+            string requiredAuthorityRuntimeId) =>
+            (authorityRuntimeIds ?? Array.Empty<string>())
+                .Where(id => !string.IsNullOrWhiteSpace(id))
+                .Where(id => string.IsNullOrWhiteSpace(requiredAuthorityRuntimeId) ||
+                             string.Equals(id, requiredAuthorityRuntimeId, StringComparison.Ordinal))
+                .Distinct(StringComparer.Ordinal)
+                .OrderBy(id => id, StringComparer.Ordinal)
+                .ToArray();
+
     }
 }
diff --git a/packages/org.gamecult.eve.unity-scene/Runtime/EveUnityPlayableWorldLiveClient.cs b/packages/org.gamecult.eve.unity-scene/Runtime/EveUnityPlayableWorldLiveClient.cs
index 4767284..f8d7182 100644
--- a/packages/org.gamecult.eve.unity-scene/Runtime/EveUnityPlayableWorldLiveClient.cs
+++ b/packages/org.gamecult.eve.unity-scene/Runtime/EveUnityPlayableWorldLiveClient.cs
@@ -253,9 +253,11 @@ namespace GameCult.Eve.UnityScene
             string providerId,
             string surfaceId,
             string surfaceKind,
-            IReadOnlyList<string>? rendezvousEndpoints = null)
+            IReadOnlyList<string>? rendezvousEndpoints = null,
+            string authorityRuntimeId = "")
         {
             VerseId = verseId ?? "";
+            AuthorityRuntimeId = authorityRuntimeId ?? "";
             ProviderId = providerId ?? "";
             SurfaceId = surfaceId ?? "";
             SurfaceKind = surfaceKind ?? "";
@@ -263,6 +265,7 @@ namespace GameCult.Eve.UnityScene
         }
 
         public string VerseId { get; }
+        public string AuthorityRuntimeId { get; }
         public string ProviderId { get; }
         public string SurfaceId { get; }
         public string SurfaceKind { get; }
diff --git a/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveUnityCultMeshAssetLookupTests.cs b/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveUnityCultMeshAssetLookupTests.cs
index 8e70be8..36d906a 100644
--- a/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveUnityCultMeshAssetLookupTests.cs
+++ b/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveUnityCultMeshAssetLookupTests.cs
@@ -168,6 +168,24 @@ namespace GameCult.Eve.UnityScene.Tests
             Assert.That(typeof(EveUnityCultMeshProviderSelection).GetProperty("Endpoint"), Is.Null);
         }
 
+        [Test]
+        public void NavigationAuthorityCannotBeReplacedByAlphabeticallyEarlierPeer()
+        {
+            var target = new EveUnitySceneNavigationTarget(
+                "gamecult.aetheria",
+                "aetheria.daemon",
+                "aetheria.pilot",
+                "interactive-world",
+                new[] { "cultnet+tcp://odin.example:3075" },
+                "z-owner");
+            var eligible = EveUnityCultMeshProviderDiscovery.EligibleAuthorityRuntimeIds(
+                new[] { "a-decoy", "z-owner" },
+                target.AuthorityRuntimeId);
+
+            Assert.That(target.AuthorityRuntimeId, Is.EqualTo("z-owner"));
+            CollectionAssert.AreEqual(new[] { "z-owner" }, eligible);
+        }
+
         private static EveSurfaceCommandRequest Request(string id, string command) => new EveSurfaceCommandRequest(
             "test.provider",
             "test.surface",
diff --git a/packages/org.gamecult.eve.unity-scene/package.json b/packages/org.gamecult.eve.unity-scene/package.json
index d3a5fa1..ecf856e 100644
--- a/packages/org.gamecult.eve.unity-scene/package.json
+++ b/packages/org.gamecult.eve.unity-scene/package.json
@@ -1,7 +1,7 @@
 {
     "name": "org.gamecult.eve.unity-scene",
     "displayName": "Eve Unity Scene Lowering",
-    "version": "0.3.119",
+    "version": "0.3.120",
     "unity": "6000.0",
     "description": "Provider-agnostic Unity scene shell for gamecult.eve.surface.v1 interactive world surfaces.",
     "dependencies": {