diff --git a/src/api/serializers.py b/src/api/serializers.py
index 087a3fc22b3d6710493193198cc3394d31874d75..ac19fd91ecf768c599b909d875f1ddd9c119dbc3 100644
--- a/src/api/serializers.py
+++ b/src/api/serializers.py
@@ -114,10 +114,14 @@ class ConferenceSerializer(HubModelSerializer):
             'is_public',
             'start',
             'end',
+            'registration_start',
             'registration_deadline',
             'tracks',
         ]
-        staff_only_fields = ['is_public']
+        staff_only_fields = [
+            'is_public',
+            'publication_date',
+        ]
 
 
 class ConferenceTrackSerializer(HubModelSerializer):
diff --git a/src/backoffice/views/assemblies.py b/src/backoffice/views/assemblies.py
index 44fc93eceba29b9c60a4b2d5d429c9242a6b9bc6..b2ca54024d054b3679937bb6d482162fceadd89a 100644
--- a/src/backoffice/views/assemblies.py
+++ b/src/backoffice/views/assemblies.py
@@ -6,7 +6,7 @@ from rest_framework.authtoken.models import Token
 from django.conf import settings
 from django.contrib import messages
 from django.core.exceptions import PermissionDenied
-from django.http import Http404, HttpResponse
+from django.http import Http404, HttpRequest, HttpResponse
 from django.shortcuts import get_object_or_404, redirect, render
 from django.urls import reverse
 from django.utils import timezone
@@ -20,7 +20,7 @@ from django.views.generic.edit import CreateView, FormView, UpdateView
 
 from core.integrations import BigBlueButton, Hangar, IntegrationError, WorkAdventure
 from core.models.assemblies import Assembly, AssemblyLink, AssemblyMember
-from core.models.conference import ConferenceExportCache
+from core.models.conference import ConferenceExportCache, ConferenceMember
 from core.models.events import Event
 from core.models.rooms import Room, RoomLink
 from core.models.sso import Application
@@ -57,6 +57,13 @@ class CreateAssemblyView(ConferenceLoginRequiredMixin, CreateView):
     require_conference_open = True
     template_name = 'backoffice/assembly_create.html'
 
+    def dispatch(self, request: HttpRequest, *args, **kwargs) -> HttpResponse:
+        member = ConferenceMember.objects.get(conference=self.conference, user=request.user)
+        if (member.is_staff and member.has_perm('core.assembly_team')) or self.conference.is_open:
+            return super().dispatch(request, *args, **kwargs)
+
+        raise PermissionDenied
+
     def get_context_data(self, *args, **kwargs):
         return {
             **super().get_context_data(*args, **kwargs),
diff --git a/src/core/locale/de/LC_MESSAGES/django.po b/src/core/locale/de/LC_MESSAGES/django.po
index df12d0bb9b1cc503b37d429dfcbd065ffb39c56b..6ab69f2a63e0abac805fc2a150ce71e84b5a4b05 100644
--- a/src/core/locale/de/LC_MESSAGES/django.po
+++ b/src/core/locale/de/LC_MESSAGES/django.po
@@ -673,6 +673,12 @@ msgstr "Konferenz öffentlich anzeigen"
 msgid "Conference__is_public"
 msgstr "veröffentlicht"
 
+msgid "Conference__registration_start__help"
+msgstr "Start der Registrierung für Assemblies."
+
+msgid "Conference__registration_start"
+msgstr "Registrierungsstart"
+
 msgid "Conference__registration_deadline__help"
 msgstr ""
 
diff --git a/src/core/locale/en/LC_MESSAGES/django.po b/src/core/locale/en/LC_MESSAGES/django.po
index e6cc0f624812b918b8bf935c680f9aa8ca254e04..d6ff37c1671277eb264cab8e52e803c4a14ff235 100644
--- a/src/core/locale/en/LC_MESSAGES/django.po
+++ b/src/core/locale/en/LC_MESSAGES/django.po
@@ -673,6 +673,12 @@ msgstr "show this conference publically"
 msgid "Conference__is_public"
 msgstr "is public"
 
+msgid "Conference__registration_start__help"
+msgstr "from this point in time registration will be available"
+
+msgid "Conference__registration_start"
+msgstr "registration start"
+
 msgid "Conference__registration_deadline__help"
 msgstr "until this point in time registration will be available"
 
diff --git a/src/core/migrations/0150_conference_registration_start.py b/src/core/migrations/0150_conference_registration_start.py
new file mode 100644
index 0000000000000000000000000000000000000000..b35627657f640b2b105ad851b673b30fa8b6a9c9
--- /dev/null
+++ b/src/core/migrations/0150_conference_registration_start.py
@@ -0,0 +1,23 @@
+# Generated by Django 5.1.2 on 2024-10-19 18:02
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("core", "0149_alter_event_additional_data"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="conference",
+            name="registration_start",
+            field=models.DateTimeField(
+                blank=True,
+                help_text="Conference__registration_start__help",
+                null=True,
+                verbose_name="Conference__registration_start",
+            ),
+        ),
+    ]
diff --git a/src/core/models/conference.py b/src/core/models/conference.py
index f604e69bc59a3a580d1b017482b6b523361bbb75..c65edfe5ebe18fc1b04ed6f96d0d4ea2ca50ca16 100644
--- a/src/core/models/conference.py
+++ b/src/core/models/conference.py
@@ -230,6 +230,9 @@ class Conference(models.Model):
     name = models.CharField(max_length=200, help_text=_('Conference__name__help'), verbose_name=_('Conference__name'))
 
     is_public = models.BooleanField(default=False, help_text=_('Conference__is_public__help'), verbose_name=_('Conference__is_public'))
+    registration_start = models.DateTimeField(
+        blank=True, null=True, help_text=_('Conference__registration_start__help'), verbose_name=_('Conference__registration_start')
+    )
     registration_deadline = models.DateTimeField(
         blank=True, null=True, help_text=_('Conference__registration_deadline__help'), verbose_name=_('Conference__registration_deadline')
     )
@@ -360,7 +363,11 @@ class Conference(models.Model):
 
     @cached_property
     def is_open(self):
-        return self.is_public and (self.registration_deadline is None or self.registration_deadline > timezone.now())
+        return (
+            self.is_public
+            and (self.registration_start is None or self.registration_start < timezone.now())
+            and (self.registration_deadline is None or self.registration_deadline > timezone.now())
+        )
 
     @cached_property
     def is_running(self):