diff --git a/OpenSim/Region/Framework/Interfaces/INPCModule.cs b/OpenSim/Region/Framework/Interfaces/INPCModule.cs
index 3ec1bda71f..c50e734c18 100644
--- a/OpenSim/Region/Framework/Interfaces/INPCModule.cs
+++ b/OpenSim/Region/Framework/Interfaces/INPCModule.cs
@@ -125,7 +125,7 @@ namespace OpenSim.Region.Framework.Interfaces
         /// <param name="agentID">The UUID of the NPC</param>
         /// <param name="scene"></param>
         /// <returns>True if the operation succeeded, false if there was no such agent or the agent was not an NPC</returns>
-        bool DeleteNPC(UUID agentID, UUID CallerID, Scene scene);
+        bool DeleteNPC(UUID agentID, Scene scene);
 
         /// <summary>
         /// Get the owner of a NPC
diff --git a/OpenSim/Region/OptionalModules/World/NPC/NPCModule.cs b/OpenSim/Region/OptionalModules/World/NPC/NPCModule.cs
index 8f9b513b9b..d90309f66f 100644
--- a/OpenSim/Region/OptionalModules/World/NPC/NPCModule.cs
+++ b/OpenSim/Region/OptionalModules/World/NPC/NPCModule.cs
@@ -266,16 +266,13 @@ namespace OpenSim.Region.OptionalModules.World.NPC
             return UUID.Zero;
         }
 
-        public bool DeleteNPC(UUID agentID, UUID callerID, Scene scene)
+        public bool DeleteNPC(UUID agentID, Scene scene)
         {
             lock (m_avatars)
             {
                 NPCAvatar av;
                 if (m_avatars.TryGetValue(agentID, out av))
                 {
-                    if (!CheckPermissions(av, callerID));
-                        return false;
-
                     scene.RemoveClient(agentID, false);
                     m_avatars.Remove(agentID);
 
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
index 1d7a2105ac..509bbecde9 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs
@@ -2173,6 +2173,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 if (!UUID.TryParse(npc.m_string, out npcId))
                     return;
 
+                if (!npcModule.CheckPermissions(npcId, m_host.OwnerID))
+                    return;
+
                 string appearanceSerialized = LoadNotecard(notecard);
                 OSDMap appearanceOsd = (OSDMap)OSDParser.DeserializeLLSDXml(appearanceSerialized);
 //                OSD a = OSDParser.DeserializeLLSDXml(appearanceSerialized);
@@ -2196,7 +2199,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 if (!UUID.TryParse(npc.m_string, out npcId))
                     return new LSL_Vector(0, 0, 0);
 
-                if (!npcModule.IsNPC(npcId, m_host.ParentGroup.Scene))
+                if (!npcModule.CheckPermissions(npcId, m_host.OwnerID))
                     return new LSL_Vector(0, 0, 0);
 
                 Vector3 pos = World.GetScenePresence(npcId).AbsolutePosition;
@@ -2216,6 +2219,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 UUID npcId;
                 if (!UUID.TryParse(npc.m_string, out npcId))
                     return;
+
+                if (!module.CheckPermissions(npcId, m_host.OwnerID))
+                    return;
                 
                 Vector3 pos = new Vector3((float) position.x, (float) position.y, (float) position.z);
                 module.MoveToTarget(npcId, World, pos, false, true);
@@ -2233,6 +2239,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 if (!UUID.TryParse(npc.m_string, out npcId))
                     return;
 
+                if (!module.CheckPermissions(npcId, m_host.OwnerID))
+                    return;
+
                 Vector3 pos = new Vector3((float)target.x, (float)target.y, (float)target.z);
                 module.MoveToTarget(
                     new UUID(npc.m_string),
@@ -2254,7 +2263,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 if (!UUID.TryParse(npc.m_string, out npcId))
                     return new LSL_Rotation(Quaternion.Identity.X, Quaternion.Identity.Y, Quaternion.Identity.Z, Quaternion.Identity.W);
 
-                if (!npcModule.IsNPC(npcId, m_host.ParentGroup.Scene))
+                if (!npcModule.CheckPermissions(npcId, m_host.OwnerID))
                     return new LSL_Rotation(Quaternion.Identity.X, Quaternion.Identity.Y, Quaternion.Identity.Z, Quaternion.Identity.W);
 
                 ScenePresence sp = World.GetScenePresence(npcId);
@@ -2277,7 +2286,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                 if (!UUID.TryParse(npc.m_string, out npcId))
                     return;
 
-                if (!npcModule.IsNPC(npcId, m_host.ParentGroup.Scene))
+                if (!npcModule.CheckPermissions(npcId, m_host.OwnerID))
                     return;
 
                 ScenePresence sp = World.GetScenePresence(npcId);
@@ -2291,7 +2300,14 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
 
             INPCModule module = World.RequestModuleInterface<INPCModule>();
             if (module != null)
-                module.StopMoveToTarget(new UUID(npc.m_string), World);
+            {
+                UUID npcId = new UUID(npc.m_string);
+
+                if (!module.CheckPermissions(npcId, m_host.OwnerID))
+                    return;
+
+                module.StopMoveToTarget(npcId, World);
+            }
         }
 
         public void osNpcSay(LSL_Key npc, string message)
@@ -2301,7 +2317,12 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             INPCModule module = World.RequestModuleInterface<INPCModule>();
             if (module != null)
             {
-                module.Say(new UUID(npc.m_string), World, message);
+                UUID npcId = new UUID(npc.m_string);
+
+                if (!module.CheckPermissions(npcId, m_host.OwnerID))
+                    return;
+
+                module.Say(npcId, World, message);
             }
         }
 
@@ -2312,7 +2333,12 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             INPCModule module = World.RequestModuleInterface<INPCModule>();
             if (module != null)
             {
-                module.Sit(new UUID(npc.m_string), new UUID(target.m_string), World);
+                UUID npcId = new UUID(npc.m_string);
+
+                if (!module.CheckPermissions(npcId, m_host.OwnerID))
+                    return;
+
+                module.Sit(npcId, new UUID(target.m_string), World);
             }
         }
 
@@ -2323,7 +2349,12 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             INPCModule module = World.RequestModuleInterface<INPCModule>();
             if (module != null)
             {
-                module.Stand(new UUID(npc.m_string), World);
+                UUID npcId = new UUID(npc.m_string);
+
+                if (!module.CheckPermissions(npcId, m_host.OwnerID))
+                    return;
+
+                module.Stand(npcId, World);
             }
         }
 
@@ -2334,7 +2365,12 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             INPCModule module = World.RequestModuleInterface<INPCModule>();
             if (module != null)
             {
-                module.DeleteNPC(new UUID(npc.m_string), m_host.OwnerID, World);
+                UUID npcId = new UUID(npc.m_string);
+
+                if (!module.CheckPermissions(npcId, m_host.OwnerID))
+                    return;
+
+                module.DeleteNPC(npcId, World);
             }
         }
 
@@ -2346,12 +2382,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             if (module != null)
             {
                 UUID npcID = new UUID(npc.m_string);
-                if (module.IsNPC(npcID, m_host.ParentGroup.Scene))
-                {
-                    UUID ownerID = module.GetOwner(npcID);
-                    if (ownerID == UUID.Zero || ownerID == m_host.OwnerID)
-                        AvatarPlayAnimation(npcID.ToString(), animation);
-                }
+
+                if (module.CheckPermissions(npcID, m_host.OwnerID))
+                    AvatarPlayAnimation(npcID.ToString(), animation);
             }
         }
 
@@ -2363,12 +2396,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             if (module != null)
             {
                 UUID npcID = new UUID(npc.m_string);
-                if (module.IsNPC(npcID, m_host.ParentGroup.Scene))
-                {
-                    UUID ownerID = module.GetOwner(npcID);
-                    if (ownerID == UUID.Zero || ownerID == m_host.OwnerID)
-                        AvatarStopAnimation(npcID.ToString(), animation);
-                }
+
+                if (module.CheckPermissions(npcID, m_host.OwnerID))
+                    AvatarPlayAnimation(npcID.ToString(), animation);
             }
         }