diff --git a/sapl/base/models.py b/sapl/base/models.py
index e481e4d1d..640bb7d52 100644
--- a/sapl/base/models.py
+++ b/sapl/base/models.py
@@ -1,8 +1,8 @@
+import reversion
 from django.contrib.contenttypes.fields import GenericForeignKey
 from django.contrib.contenttypes.models import ContentType
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
-import reversion
 
 from sapl.utils import UF, YES_NO_CHOICES, get_settings_auth_user_model
 
diff --git a/sapl/comissoes/models.py b/sapl/comissoes/models.py
index 3f0a37144..4483dd07a 100644
--- a/sapl/comissoes/models.py
+++ b/sapl/comissoes/models.py
@@ -1,8 +1,8 @@
 
+import reversion
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 from model_utils import Choices
-import reversion
 
 from sapl.base.models import Autor
 from sapl.parlamentares.models import Parlamentar
diff --git a/sapl/compilacao/models.py b/sapl/compilacao/models.py
index a633303ee..2b0e63473 100644
--- a/sapl/compilacao/models.py
+++ b/sapl/compilacao/models.py
@@ -1,5 +1,6 @@
 from datetime import datetime
 
+import reversion
 from django.contrib import messages
 from django.contrib.contenttypes.fields import GenericForeignKey
 from django.contrib.contenttypes.models import ContentType
@@ -11,7 +12,6 @@ from django.http.response import Http404
 from django.template import defaultfilters
 from django.utils.decorators import classonlymethod
 from django.utils.translation import ugettext_lazy as _
-import reversion
 
 from sapl.compilacao.utils import (get_integrations_view_names, int_to_letter,
                                    int_to_roman)
diff --git a/sapl/legacy/migration.py b/sapl/legacy/migration.py
index 626aed4ee..f4b6f00a6 100644
--- a/sapl/legacy/migration.py
+++ b/sapl/legacy/migration.py
@@ -1,20 +1,20 @@
 import re
 from datetime import date
+from subprocess import PIPE, call
 
-from subprocess import call, PIPE
 import pkg_resources
+import reversion
 import yaml
 from django.apps import apps
 from django.apps.config import AppConfig
 from django.contrib.auth import get_user_model
 from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ObjectDoesNotExist
-from django.db import connections, models, OperationalError, ProgrammingError
-from django.db.models import CharField, TextField, ProtectedError, Max, signals
+from django.db import OperationalError, ProgrammingError, connections, models
+from django.db.models import CharField, Max, ProtectedError, TextField, signals
 from django.db.models.base import ModelBase
 from model_mommy import mommy
 from model_mommy.mommy import foreign_key_required, make
-import reversion
 from reversion.models import Revision, Version
 
 from sapl.base.models import Autor, ProblemaMigracao
@@ -23,7 +23,6 @@ from sapl.legacy.models import Protocolo as ProtocoloLegado
 from sapl.materia.models import (Proposicao, StatusTramitacao, TipoDocumento,
                                  TipoMateriaLegislativa, TipoProposicao,
                                  Tramitacao)
-from sapl.legacy.models import Protocolo as ProtocoloLegado
 from sapl.norma.models import (AssuntoNorma, NormaJuridica,
                                TipoVinculoNormaJuridica)
 from sapl.parlamentares.models import Parlamentar
diff --git a/sapl/lexml/models.py b/sapl/lexml/models.py
index 8c30d9ee1..f6315d399 100644
--- a/sapl/lexml/models.py
+++ b/sapl/lexml/models.py
@@ -1,6 +1,6 @@
+import reversion
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
-import reversion
 
 
 @reversion.register()
diff --git a/sapl/materia/models.py b/sapl/materia/models.py
index c0d5f3383..02b63840a 100644
--- a/sapl/materia/models.py
+++ b/sapl/materia/models.py
@@ -1,5 +1,6 @@
 from datetime import datetime
 
+import reversion
 from django.contrib.auth.models import Group
 from django.contrib.contenttypes.fields import GenericRelation
 from django.contrib.contenttypes.models import ContentType
@@ -8,7 +9,6 @@ from django.db.models.deletion import PROTECT
 from django.utils import formats
 from django.utils.translation import ugettext_lazy as _
 from model_utils import Choices
-import reversion
 
 from sapl.base.models import Autor
 from sapl.comissoes.models import Comissao
diff --git a/sapl/norma/models.py b/sapl/norma/models.py
index 86745c8b1..8a412be1c 100644
--- a/sapl/norma/models.py
+++ b/sapl/norma/models.py
@@ -1,9 +1,9 @@
+import reversion
 from django.contrib.contenttypes.fields import GenericRelation
 from django.db import models
 from django.template import defaultfilters
 from django.utils.translation import ugettext_lazy as _
 from model_utils import Choices
-import reversion
 
 from sapl.compilacao.models import TextoArticulado
 from sapl.materia.models import MateriaLegislativa
diff --git a/sapl/painel/models.py b/sapl/painel/models.py
index 0f3427f3a..097981520 100644
--- a/sapl/painel/models.py
+++ b/sapl/painel/models.py
@@ -1,6 +1,6 @@
+import reversion
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
-import reversion
 
 
 @reversion.register()
diff --git a/sapl/parlamentares/models.py b/sapl/parlamentares/models.py
index 28a2e5677..aece985c8 100644
--- a/sapl/parlamentares/models.py
+++ b/sapl/parlamentares/models.py
@@ -1,10 +1,10 @@
 from datetime import datetime
 
+import reversion
 from django.contrib.auth.models import User
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 from model_utils import Choices
-import reversion
 
 from sapl.base.models import Autor
 from sapl.utils import (INDICADOR_AFASTAMENTO, UF, YES_NO_CHOICES,
diff --git a/sapl/protocoloadm/models.py b/sapl/protocoloadm/models.py
index 25bee0665..78cfc7fd3 100644
--- a/sapl/protocoloadm/models.py
+++ b/sapl/protocoloadm/models.py
@@ -1,7 +1,7 @@
+import reversion
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 from model_utils import Choices
-import reversion
 
 from sapl.base.models import Autor
 from sapl.materia.models import TipoMateriaLegislativa, UnidadeTramitacao
diff --git a/sapl/rules/apps.py b/sapl/rules/apps.py
index e9bf2c50e..ab8c6322c 100644
--- a/sapl/rules/apps.py
+++ b/sapl/rules/apps.py
@@ -1,6 +1,7 @@
 from builtins import LookupError
 
 import django
+import reversion
 from django.apps import apps
 from django.conf import settings
 from django.contrib.auth import get_user_model
@@ -10,8 +11,6 @@ from django.db import models, router
 from django.db.utils import DEFAULT_DB_ALIAS
 from django.utils.translation import ugettext_lazy as _
 from django.utils.translation import string_concat
-import django
-import reversion
 
 from sapl.rules import (SAPL_GROUP_ADMINISTRATIVO, SAPL_GROUP_COMISSOES,
                         SAPL_GROUP_GERAL, SAPL_GROUP_MATERIA, SAPL_GROUP_NORMA,
diff --git a/sapl/sessao/models.py b/sapl/sessao/models.py
index 572a1cad2..ffbb4d753 100644
--- a/sapl/sessao/models.py
+++ b/sapl/sessao/models.py
@@ -1,8 +1,8 @@
+import reversion
 from django.contrib.auth.models import User
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 from model_utils import Choices
-import reversion
 
 from sapl.base.models import Autor
 from sapl.materia.models import MateriaLegislativa
diff --git a/sapl/sessao/urls.py b/sapl/sessao/urls.py
index d90fb64bb..3e43ff1bc 100644
--- a/sapl/sessao/urls.py
+++ b/sapl/sessao/urls.py
@@ -19,12 +19,12 @@ from sapl.sessao.views import (AdicionarVariasMateriasExpediente,
                                VotacaoNominalExpedienteView,
                                VotacaoNominalView, VotacaoView,
                                abrir_votacao_expediente_view,
-                               abrir_votacao_ordem_view, recuperar_materia,
+                               abrir_votacao_ordem_view,
+                               mudar_ordem_materia_sessao, recuperar_materia,
                                recuperar_numero_sessao,
                                reordernar_materias_expediente,
                                reordernar_materias_ordem,
-                               sessao_legislativa_legislatura_ajax,
-                               mudar_ordem_materia_sessao)
+                               sessao_legislativa_legislatura_ajax)
 
 from .apps import AppConfig
 
diff --git a/sapl/utils.py b/sapl/utils.py
index 9afe021a8..09902fae9 100644
--- a/sapl/utils.py
+++ b/sapl/utils.py
@@ -20,8 +20,6 @@ from django.utils.text import slugify
 from django.utils.translation import ugettext_lazy as _
 from floppyforms import ClearableFileInput
 from reversion.admin import VersionAdmin
-import django_filters
-import magic
 
 from sapl.crispy_layout_mixin import SaplFormLayout, form_actions, to_row
 from sapl.settings import BASE_DIR