diff --git a/beat/web/databases/admin.py b/beat/web/databases/admin.py
index 35d43c911b2badfeda484110d7b92d487ee200a3..a8467029eb99a6d32445971c0590a5b28f94da58 100755
--- a/beat/web/databases/admin.py
+++ b/beat/web/databases/admin.py
@@ -38,8 +38,12 @@ from .models import DatabaseSetTemplate as DatabaseSetTemplateModel
 from .models import DatabaseSetTemplateOutput as DatabaseSetTemplateOutputModel
 from .models import validate_database
 
-from ..ui.forms import CodeMirrorJSONFileField, CodeMirrorRSTFileField, \
-    CodeMirrorPythonFileField, NameField
+from ..ui.forms import (
+    CodeMirrorJSONFileField,
+    CodeMirrorRSTFileField,
+    CodeMirrorPythonFileField,
+    NameField,
+)
 
 from ..common.texts import Messages
 from ..common.admin import notify_by_email
@@ -48,52 +52,45 @@ from ..common.models import Shareable
 import simplejson as json
 
 
-#------------------------------------------------
+# ------------------------------------------------
 
 
 class DatabaseModelForm(forms.ModelForm):
 
     name = NameField(
-        widget=forms.TextInput(attrs=dict(size=80)),
-        help_text=Messages['name'],
+        widget=forms.TextInput(attrs=dict(size=80)), help_text=Messages["name"]
     )
 
     declaration_file = CodeMirrorJSONFileField(
-        label='Declaration',
-        help_text=Messages['json'],
+        label="Declaration", help_text=Messages["json"]
     )
 
     source_code_file = CodeMirrorPythonFileField(
-        label='Source code',
-        help_text=Messages['code'],
+        label="Source code", help_text=Messages["code"]
     )
 
     description_file = CodeMirrorRSTFileField(
-        label='Description',
+        label="Description",
         required=False,
         allow_empty_file=True,
-        help_text=Messages['description'],
+        help_text=Messages["description"],
     )
 
     class Meta:
         model = DatabaseModel
         exclude = []
-        widgets = {
-            'short_description': forms.TextInput(
-                attrs=dict(size=100),
-            ),
-        }
+        widgets = {"short_description": forms.TextInput(attrs=dict(size=100))}
 
     def clean_declaration_file(self):
         """Cleans-up the declaration_file data, make sure it is really new"""
 
-        new_declaration = self.cleaned_data['declaration_file'].read()
-        old_declaration = ''
+        new_declaration = self.cleaned_data["declaration_file"].read()
+        old_declaration = ""
 
         if self.instance and self.instance.declaration_file.name is not None:
             old_declaration = self.instance.declaration_string
             if new_declaration == old_declaration:
-                self.changed_data.remove('declaration_file')
+                self.changed_data.remove("declaration_file")
                 content_file = ContentFile(old_declaration)
                 content_file.name = self.instance.declaration_file.name
                 return content_file
@@ -109,206 +106,195 @@ class DatabaseModelForm(forms.ModelForm):
             raise forms.ValidationError(all_errors)
 
         # if that works out, then we return the passed file
-        self.cleaned_data['declaration_file'].seek(0) #reset ContentFile readout
-        return self.cleaned_data['declaration_file']
+        self.cleaned_data["declaration_file"].seek(0)  # reset ContentFile readout
+        return self.cleaned_data["declaration_file"]
 
     def clean(self):
         """Cleans-up the input data, make sure it overall validates"""
 
-        if 'declaration_file' in self.data and \
-                isinstance(self.data['declaration_file'], six.string_types):
+        if "declaration_file" in self.data and isinstance(
+            self.data["declaration_file"], six.string_types
+        ):
             mutable_data = self.data.copy()
-            mutable_data['declaration_file'] = ContentFile(self.data['declaration_file'], name='unsaved')
+            mutable_data["declaration_file"] = ContentFile(
+                self.data["declaration_file"], name="unsaved"
+            )
             self.data = mutable_data
 
 
-
-#----------------------------------------------------------
+# ----------------------------------------------------------
 
 
 class DatabaseProtocolInline(admin.TabularInline):
 
-    model           = DatabaseProtocolModel
-    can_delete      = False
-    extra           = 0
-    max_num         = 0
-    readonly_fields = ('name',)
-    ordering        = ('name',)
+    model = DatabaseProtocolModel
+    can_delete = False
+    extra = 0
+    max_num = 0
+    readonly_fields = ("name",)
+    ordering = ("name",)
 
 
-#----------------------------------------------------------
+# ----------------------------------------------------------
 
 
 class Database(admin.ModelAdmin):
 
     list_display = (
-        'id',
-            'name',
-            'version',
-            'short_description',
-            'creation_date',
-            'previous_version',
-            'sharing',
+        "id",
+        "name",
+        "version",
+        "short_description",
+        "creation_date",
+        "previous_version",
+        "sharing",
     )
     search_fields = [
-        'name',
-            'short_description',
-            'previous_version__author__username',
-            'previous_version__name'
+        "name",
+        "short_description",
+        "previous_version__author__username",
+        "previous_version__name",
     ]
-    list_display_links = (
-        'id',
-            'name',
-    )
+    list_display_links = ("id", "name")
 
-    readonly_fields    = ('short_description',)
+    readonly_fields = ("short_description",)
 
     form = DatabaseModelForm
 
-    inlines = [
-        DatabaseProtocolInline,
-    ]
-
-    filter_horizontal = [
-        'shared_with',
-        'shared_with_team'
-    ]
+    inlines = [DatabaseProtocolInline]
 
+    filter_horizontal = ["shared_with", "shared_with_team"]
 
     def new_version(self, request, queryset):
-      """Creates a new version of a specific database"""
-
-      count = 0
-      for olddb in queryset:
-
-        newdb = DatabaseModel()
-        newdb.name = olddb.name
-        newdb.version = olddb.version + 1
-        newdb.sharing = Shareable.PRIVATE
-        newdb.declaration = olddb.declaration
-        newdb.source_code = olddb.source_code
-        newdb.description = olddb.description
-        newdb.previous_version = olddb
-        newdb.save()
-        count += 1
-
-      self.message_user(request, "Created %s new version(s) of selected " \
-                        "databases." % count)
-    new_version.short_description = 'Create new version'
-
-    actions = [
-        notify_by_email('database_notifications_enabled'),
-        'new_version',
-    ]
+        """Creates a new version of a specific database"""
+
+        count = 0
+        for olddb in queryset:
+
+            newdb = DatabaseModel()
+            newdb.name = olddb.name
+            newdb.version = olddb.version + 1
+            newdb.sharing = Shareable.PRIVATE
+            newdb.declaration = olddb.declaration
+            newdb.source_code = olddb.source_code
+            newdb.description = olddb.description
+            newdb.previous_version = olddb
+            newdb.save()
+            count += 1
+
+        self.message_user(
+            request, "Created %s new version(s) of selected " "databases." % count
+        )
+
+    new_version.short_description = "Create new version"
+
+    actions = [notify_by_email("database_notifications_enabled"), "new_version"]
 
     fieldsets = (
-        (None,
-         dict(
-             fields=('name',),
-         ),
-          ),
-        ('Documentation',
-         dict(
-             classes=('collapse',),
-             fields=('short_description', 'description_file'),
-         ),
-          ),
-        ('Versioning',
-         dict(
-             classes=('collapse',),
-             fields=('version', 'previous_version'),
-         ),
-          ),
-        ('Sharing',
-         dict(
-             classes=('collapse',),
-             fields=('sharing', 'shared_with', 'shared_with_team'),
-         ),
-          ),
-        ('Source code',
-         dict(
-             fields=('declaration_file', 'source_code_file'),
-         ),
-          ),
+        (None, dict(fields=("name",))),
+        (
+            "Documentation",
+            dict(
+                classes=("collapse",), fields=("short_description", "description_file")
+            ),
+        ),
+        (
+            "Accessibility",
+            dict(
+                classes=("collapse",),
+                fields=("accessibility_start_date", "accessibility_end_date"),
+            ),
+        ),
+        (
+            "Versioning",
+            dict(classes=("collapse",), fields=("version", "previous_version")),
+        ),
+        (
+            "Sharing",
+            dict(
+                classes=("collapse",),
+                fields=("sharing", "shared_with", "shared_with_team"),
+            ),
+        ),
+        ("Source code", dict(fields=("declaration_file", "source_code_file"))),
     )
 
+
 admin.site.register(DatabaseModel, Database)
 
 
-#------------------------------------------------
+# ------------------------------------------------
 
 
 class DatabaseSetTemplateOutputInline(admin.TabularInline):
 
-    model           = DatabaseSetTemplateOutputModel
-    extra           = 0
-    ordering        = ('name',)
-    readonly_fields = ('name', 'dataformat')
+    model = DatabaseSetTemplateOutputModel
+    extra = 0
+    ordering = ("name",)
+    readonly_fields = ("name", "dataformat")
 
     def has_delete_permission(self, request, obj=None):
         return False
 
     def has_add_permission(self, request):
-            return False
+        return False
 
 
 class DatabaseSetTemplate(admin.ModelAdmin):
 
-    list_display        = ('id', 'name')
-    search_fields       = ['name']
-    list_display_links  = ('id', 'name')
-    readonly_fields = ('name',)
+    list_display = ("id", "name")
+    search_fields = ["name"]
+    list_display_links = ("id", "name")
+    readonly_fields = ("name",)
 
-    inlines = [
-        DatabaseSetTemplateOutputInline,
-    ]
+    inlines = [DatabaseSetTemplateOutputInline]
 
     def has_delete_permission(self, request, obj=None):
         return False
 
     def has_add_permission(self, request):
-            return False
+        return False
 
 
 admin.site.register(DatabaseSetTemplateModel, DatabaseSetTemplate)
 
 
-#------------------------------------------------
+# ------------------------------------------------
 
 
 class DatabaseSetOutputInline(admin.TabularInline):
 
-    model           = DatabaseSetOutputModel
-    extra           = 0
-    ordering        = ('template__name',)
-    readonly_fields = ('template',)
+    model = DatabaseSetOutputModel
+    extra = 0
+    ordering = ("template__name",)
+    readonly_fields = ("template",)
 
     def has_delete_permission(self, request, obj=None):
         return False
 
     def has_add_permission(self, request):
-            return False
+        return False
 
 
 class DatabaseSet(admin.ModelAdmin):
 
-    list_display        = ('id', 'protocol', 'name', 'template', 'hash')
-    search_fields       = ['name',
-                           'template__name',
-                           'protocol__database__name',
-                           'protocol__name']
-    list_display_links  = ('id', 'name')
-    readonly_fields = ('name', 'template', 'protocol', 'hash')
-
-    inlines = [
-        DatabaseSetOutputInline,
+    list_display = ("id", "protocol", "name", "template", "hash")
+    search_fields = [
+        "name",
+        "template__name",
+        "protocol__database__name",
+        "protocol__name",
     ]
+    list_display_links = ("id", "name")
+    readonly_fields = ("name", "template", "protocol", "hash")
+
+    inlines = [DatabaseSetOutputInline]
 
     def has_delete_permission(self, request, obj=None):
         return False
 
     def has_add_permission(self, request):
-            return False
+        return False
 
 
 admin.site.register(DatabaseSetModel, DatabaseSet)