diff --git a/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java b/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java
index b4229ed4..75d0f42a 100644
--- a/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java
+++ b/src/main/java/info/bukova/isspst/services/requirement/RequirementServiceImpl.java
@@ -1,18 +1,18 @@
 package info.bukova.isspst.services.requirement;
 
 import info.bukova.isspst.data.Requirement;
-import info.bukova.isspst.services.AbstractOwnedService;
 
 import java.util.Date;
 
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.transaction.annotation.Transactional;
 
-public class RequirementServiceImpl extends AbstractOwnedService<Requirement> implements RequirementService, RequirementBaseService<Requirement>
-{
+public class RequirementServiceImpl extends
+		RequirementBaseServiceImpl<Requirement> implements RequirementService,
+		RequirementBaseService<Requirement> {
+
 	@Override
-	protected Requirement createEntity()
-	{
+	protected Requirement createEntity() {
 		Requirement entity = new Requirement();
 
 		entity.setReqDate(new Date());
@@ -23,8 +23,7 @@ public class RequirementServiceImpl extends AbstractOwnedService<Requirement> im
 	@Override
 	@Transactional
 	@PreAuthorize("hasPermission(this, 'PERM_ADD')")
-	public void add(Requirement entity)
-	{
+	public void add(Requirement entity) {
 		entity.setNumser(this.getNumberSerie());
 		super.add(entity);
 	}
diff --git a/src/main/java/info/bukova/isspst/ui/requirement/RequirementSubpage.java b/src/main/java/info/bukova/isspst/ui/requirement/RequirementSubpage.java
index 45e06dfc..bf6eee07 100644
--- a/src/main/java/info/bukova/isspst/ui/requirement/RequirementSubpage.java
+++ b/src/main/java/info/bukova/isspst/ui/requirement/RequirementSubpage.java
@@ -1,17 +1,20 @@
 package info.bukova.isspst.ui.requirement;
 
-import org.zkoss.bind.annotation.Command;
-import org.zkoss.bind.annotation.NotifyChange;
-
 import info.bukova.isspst.data.RequirementBase;
-import info.bukova.isspst.data.TripRequirement;
 import info.bukova.isspst.services.requirement.RequirementBaseService;
 import info.bukova.isspst.ui.ListViewModel;
 
+import org.zkoss.bind.annotation.Command;
+import org.zkoss.bind.annotation.NotifyChange;
+
 public class RequirementSubpage<T extends RequirementBase> extends ListViewModel<T> {
 	
-	private RequirementBaseService<T> reqService;
-
+	protected RequirementBaseService<T> reqService;
+	
+	@SuppressWarnings("unchecked")
+	public void init() {
+		reqService = (RequirementBaseService<T>) service;
+	}
 
 	@Override
 	protected void loadLazyData(T data) {
diff --git a/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListAll.java b/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListAll.java
index e1bb4f52..0d1262ee 100644
--- a/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListAll.java
+++ b/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListAll.java
@@ -1,5 +1,11 @@
 package info.bukova.isspst.ui.requirement;
 
+import info.bukova.isspst.data.TripRequirement;
+import info.bukova.isspst.data.Workgroup;
+import info.bukova.isspst.filters.TripRequirementFilter;
+import info.bukova.isspst.services.requirement.TripRequirementService;
+import info.bukova.isspst.services.workgroups.WorkgroupService;
+
 import java.util.ArrayList;
 import java.util.List;
 
@@ -8,22 +14,12 @@ import org.zkoss.bind.BindUtils;
 import org.zkoss.bind.annotation.Init;
 import org.zkoss.zk.ui.select.annotation.WireVariable;
 
-import info.bukova.isspst.data.TripRequirement;
-import info.bukova.isspst.data.Workgroup;
-import info.bukova.isspst.filters.TripRequirementFilter;
-import info.bukova.isspst.services.requirement.TripRequirementService;
-import info.bukova.isspst.services.users.UserService;
-import info.bukova.isspst.services.workgroups.WorkgroupService;
-import info.bukova.isspst.ui.ListViewModel;
-
-public class TripRequirementListAll extends ListViewModel<TripRequirement> {
+public class TripRequirementListAll extends RequirementSubpage<TripRequirement> {
 	
 	@WireVariable
 	private TripRequirementService tripRequirementService;
 	@WireVariable
 	private WorkgroupService workgroupService;
-	@WireVariable
-	private UserService userService;
 	private List<Workgroup> allCentres;
 	private List<Workgroup> allWorkgroups;
 
@@ -36,6 +32,7 @@ public class TripRequirementListAll extends ListViewModel<TripRequirement> {
 		
 		allCentres = workgroupService.getCentres();
 		allWorkgroups = workgroupService.getWorkgroups();
+		super.init();
 	}
 
 	@Override
@@ -55,9 +52,5 @@ public class TripRequirementListAll extends ListViewModel<TripRequirement> {
 	public List<Workgroup> getAllWorkgroups() {
 		return allWorkgroups;
 	}
-	
-	public boolean isCanApprove() {
-		return false;
-	}
 
 }
diff --git a/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListCentre.java b/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListCentre.java
index 8acd6473..f8833c8a 100644
--- a/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListCentre.java
+++ b/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListCentre.java
@@ -6,19 +6,16 @@ import info.bukova.isspst.filters.TripRequirementFilter;
 import info.bukova.isspst.services.requirement.TripRequirementService;
 import info.bukova.isspst.services.users.UserService;
 import info.bukova.isspst.services.workgroups.WorkgroupService;
-import info.bukova.isspst.ui.ListViewModel;
 
 import java.util.ArrayList;
 import java.util.List;
 
 import org.springframework.security.access.AccessDeniedException;
 import org.zkoss.bind.BindUtils;
-import org.zkoss.bind.annotation.Command;
 import org.zkoss.bind.annotation.Init;
-import org.zkoss.bind.annotation.NotifyChange;
 import org.zkoss.zk.ui.select.annotation.WireVariable;
 
-public class TripRequirementListCentre extends ListViewModel<TripRequirement> {
+public class TripRequirementListCentre extends RequirementSubpage<TripRequirement> {
 	
 	@WireVariable
 	private TripRequirementService tripRequirementService;
@@ -36,6 +33,7 @@ public class TripRequirementListCentre extends ListViewModel<TripRequirement> {
 		dataFilter = new TripRequirementFilter(getFilterTemplate());
 		
 		myCentres = workgroupService.getUserCentres(userService.getCurrent());
+		super.init();
 	}
 
 	@Override
diff --git a/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListWorkgroup.java b/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListWorkgroup.java
index ce9267a8..d744e0a1 100644
--- a/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListWorkgroup.java
+++ b/src/main/java/info/bukova/isspst/ui/requirement/TripRequirementListWorkgroup.java
@@ -1,5 +1,12 @@
 package info.bukova.isspst.ui.requirement;
 
+import info.bukova.isspst.data.TripRequirement;
+import info.bukova.isspst.data.Workgroup;
+import info.bukova.isspst.filters.TripRequirementFilter;
+import info.bukova.isspst.services.requirement.TripRequirementService;
+import info.bukova.isspst.services.users.UserService;
+import info.bukova.isspst.services.workgroups.WorkgroupService;
+
 import java.util.ArrayList;
 import java.util.List;
 
@@ -8,15 +15,7 @@ import org.zkoss.bind.BindUtils;
 import org.zkoss.bind.annotation.Init;
 import org.zkoss.zk.ui.select.annotation.WireVariable;
 
-import info.bukova.isspst.data.TripRequirement;
-import info.bukova.isspst.data.Workgroup;
-import info.bukova.isspst.filters.TripRequirementFilter;
-import info.bukova.isspst.services.requirement.TripRequirementService;
-import info.bukova.isspst.services.users.UserService;
-import info.bukova.isspst.services.workgroups.WorkgroupService;
-import info.bukova.isspst.ui.ListViewModel;
-
-public class TripRequirementListWorkgroup extends ListViewModel<TripRequirement> {
+public class TripRequirementListWorkgroup extends RequirementSubpage<TripRequirement> {
 	
 	@WireVariable
 	private TripRequirementService tripRequirementService;
@@ -36,6 +35,7 @@ public class TripRequirementListWorkgroup extends ListViewModel<TripRequirement>
 		
 		myCentres = workgroupService.getUserCentres(userService.getCurrent());
 		myWorkgroups = workgroupService.getUserWorkgroups(userService.getCurrent());
+		super.init();
 	}
 
 	@Override
@@ -56,8 +56,4 @@ public class TripRequirementListWorkgroup extends ListViewModel<TripRequirement>
 		return myWorkgroups;
 	}
 	
-	public boolean isCanApprove() {
-		return false;
-	}
-	
 }