diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/api/v1/GeneralInformationChangingService.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/api/v1/GeneralInformationChangingService.java
index 8101df8aa1ccb9d6582c74f41764d1173f3dc224..e647b8b4f2608ddcb135ecd206aa7a19f33967e5 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/api/v1/GeneralInformationChangingService.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/api/v1/GeneralInformationChangingService.java
@@ -32,6 +32,7 @@ import ch.systemsx.cisd.common.spring.IInvocationLoggerContext;
 import ch.systemsx.cisd.openbis.generic.server.AbstractServer;
 import ch.systemsx.cisd.openbis.generic.server.authorization.annotation.AuthorizationGuard;
 import ch.systemsx.cisd.openbis.generic.server.authorization.annotation.RolesAllowed;
+import ch.systemsx.cisd.openbis.generic.server.authorization.predicate.MetaprojectIdPredicate;
 import ch.systemsx.cisd.openbis.generic.server.authorization.predicate.MetaprojectPredicate;
 import ch.systemsx.cisd.openbis.generic.server.business.IPropertiesBatchManager;
 import ch.systemsx.cisd.openbis.generic.server.dataaccess.IDAOFactory;
@@ -177,7 +178,9 @@ public class GeneralInformationChangingService extends
     @Override
     @Transactional(readOnly = false)
     @RolesAllowed(RoleWithHierarchy.SPACE_USER)
-    public void deleteMetaproject(String sessionToken, Long metaprojectId)
+    public void deleteMetaproject(String sessionToken,
+            @AuthorizationGuard(guardClass = MetaprojectIdPredicate.class)
+            Long metaprojectId)
     {
         server.deleteMetaproject(sessionToken, new TechId(metaprojectId));
     }
@@ -185,8 +188,9 @@ public class GeneralInformationChangingService extends
     @Override
     @Transactional(readOnly = false)
     @RolesAllowed(RoleWithHierarchy.SPACE_USER)
-    public void addToMetaproject(String sessionToken, Long metaprojectId,
-            Collection<Experiment> experiments, Collection<Sample> samples,
+    public void addToMetaproject(String sessionToken,
+            @AuthorizationGuard(guardClass = MetaprojectIdPredicate.class)
+            Long metaprojectId, Collection<Experiment> experiments, Collection<Sample> samples,
             Collection<DataSet> dataSets, Collection<Material> materials)
     {
         server.addToMetaproject(sessionToken, new TechId(metaprojectId),
@@ -197,8 +201,9 @@ public class GeneralInformationChangingService extends
     @Override
     @Transactional(readOnly = false)
     @RolesAllowed(RoleWithHierarchy.SPACE_USER)
-    public void removeFromMetaproject(String sessionToken, Long metaprojectId,
-            Collection<Experiment> experiments, Collection<Sample> samples,
+    public void removeFromMetaproject(String sessionToken,
+            @AuthorizationGuard(guardClass = MetaprojectIdPredicate.class)
+            Long metaprojectId, Collection<Experiment> experiments, Collection<Sample> samples,
             Collection<DataSet> dataSets, Collection<Material> materials)
     {
         server.removeFromMetaproject(sessionToken, new TechId(metaprojectId),
diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/authorization/predicate/MetaprojectIdPredicate.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/authorization/predicate/MetaprojectIdPredicate.java
new file mode 100644
index 0000000000000000000000000000000000000000..44685c07c920e6c0d485224249c4507c96b6c153
--- /dev/null
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/server/authorization/predicate/MetaprojectIdPredicate.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2012 ETH Zuerich, CISD
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package ch.systemsx.cisd.openbis.generic.server.authorization.predicate;
+
+import ch.systemsx.cisd.openbis.generic.shared.basic.TechId;
+
+/**
+ * @author Pawel Glyzewski
+ */
+public class MetaprojectIdPredicate extends DelegatedPredicate<TechId, Long>
+{
+    public MetaprojectIdPredicate()
+    {
+        super(new MetaprojectTechIdPredicate());
+    }
+
+    @Override
+    public TechId tryConvert(Long value)
+    {
+        return new TechId(value);
+    }
+
+    @Override
+    public String getCandidateDescription()
+    {
+        return "Metaproject Id";
+    }
+}