diff --git a/product/ERP5/Document/BusinessState.py b/product/ERP5/Document/BusinessState.py
index b4dcabf4e91d26c47476b4ec25fa541d7ff60aec..ac227e6673ff5edc9592a128bdc4cbd24b6c2372 100644
--- a/product/ERP5/Document/BusinessState.py
+++ b/product/ERP5/Document/BusinessState.py
@@ -59,7 +59,7 @@ class BusinessState(XMLObject):
                     )
 
   # Declarative interfaces
-  zope.interface.implements(interfaces.IBusinessState
+  zope.interface.implements(
                             )
 
   # IBusinessCompletable implementation
diff --git a/product/ERP5/ERP5Defaults.py b/product/ERP5/ERP5Defaults.py
index 199bfaa01c84bf91bd6199c70123b5bfce868089..6d56eb544c3c6c6afa65574c9ba162257113d51e 100644
--- a/product/ERP5/ERP5Defaults.py
+++ b/product/ERP5/ERP5Defaults.py
@@ -186,7 +186,6 @@ portal_supply_type_list = ('Purchase Supply','Sale Supply')
 portal_supply_path_type_list = ('Supply Line','Supply Cell')
 
 portal_business_process_type_list = ('Business Process',)
-portal_business_state_type_list = ('Business State',)
 portal_business_path_type_list = ('Business Path',)
 
 # This transaction lines are special because destination must be None.
diff --git a/product/ERP5/ERP5Site.py b/product/ERP5/ERP5Site.py
index bcc5920930ec1c90f1ab7972518290ab1b3508ff..cf75c26dac843981f878eca0031f789e656c12ec 100644
--- a/product/ERP5/ERP5Site.py
+++ b/product/ERP5/ERP5Site.py
@@ -784,15 +784,6 @@ class ERP5Site(FolderMixIn, CMFSite):
     return self._getPortalGroupedTypeList('business_process') or \
            self._getPortalConfiguration('portal_business_process_type_list')
 
-  security.declareProtected(Permissions.AccessContentsInformation,
-                            'getPortalBusinessStateTypeList')
-  def getPortalBusinessStateTypeList(self):
-    """
-      Return business state types.
-    """
-    return self._getPortalGroupedTypeList('business_state') or \
-           self._getPortalConfiguration('portal_business_state_type_list')
-
   security.declareProtected(Permissions.AccessContentsInformation,
                             'getPortalBusinessPathTypeList')
   def getPortalBusinessPathTypeList(self):
diff --git a/product/ERP5/interfaces/business_state.py b/product/ERP5/interfaces/business_state.py
deleted file mode 100644
index aca70145d048f81d0d7d9f6eb41f87114a0240b9..0000000000000000000000000000000000000000
--- a/product/ERP5/interfaces/business_state.py
+++ /dev/null
@@ -1,40 +0,0 @@
-# -*- coding: utf-8 -*-
-##############################################################################
-#
-# Copyright (c) 2009 Nexedi SA and Contributors. All Rights Reserved.
-#                    Jean-Paul Smets-Solanes <jp@nexedi.com>
-#
-# WARNING: This program as such is intended to be used by professional
-# programmers who take the whole responsability of assessing all potential
-# consequences resulting from its eventual inadequacies and bugs
-# End users who are looking for a ready-to-use solution with commercial
-# garantees and support are strongly adviced to contract a Free Software
-# Service Company
-#
-# This program is Free Software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 2
-# of the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
-#
-##############################################################################
-"""
-Products.ERP5.interfaces.business_state
-"""
-
-from Products.ERP5.interfaces.business_completable import IBusinessCompletable
-
-class IBusinessState(IBusinessCompletable):
-  """Business State interface specification
-  
-  TODO:
-    - add methods if any or remove if nothing specific to Business State
-  """
diff --git a/product/ERP5/tests/testAccountingRules.py b/product/ERP5/tests/testAccountingRules.py
index 7f9a723a8bbf24fe5a46bad1c9448fbe64b0f89b..debd6e5edf87908813f4f0b6fd8dc67ec6cd9757 100644
--- a/product/ERP5/tests/testAccountingRules.py
+++ b/product/ERP5/tests/testAccountingRules.py
@@ -95,7 +95,7 @@ class TestAccountingRulesMixin:
   def getBusinessTemplateList(self):
     """  Return the list of business templates. """
     return ('erp5_base','erp5_pdm', 'erp5_trade', 'erp5_accounting',
-        'erp5_invoicing', 'erp5_simplified_invoicing')
+        'erp5_invoicing', 'erp5_simplified_invoicing', 'erp5_simulation')
 
   def getAccountModule(self):
     return getattr(self.getPortal(), 'account',