diff --git a/src/Security/Voter/AssignmentVoter.php b/src/Security/Voter/AssignmentVoter.php
index 059323c..b28dae8 100644
--- a/src/Security/Voter/AssignmentVoter.php
+++ b/src/Security/Voter/AssignmentVoter.php
@@ -2,9 +2,11 @@
 
 namespace App\Security\Voter;
 
+use App\Entity\Application;
 use App\Entity\Assignment;
+use App\Entity\Disposition;
 use App\Entity\User;
-use App\Repository\ApplicationRepository;
+use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
 use Symfony\Component\Security\Core\Authorization\Voter\Voter;
 
@@ -14,7 +16,7 @@ class AssignmentVoter extends Voter
     public const EDIT = 'EDIT';
     public const APPLY = 'APPLY';
 
-    public function __construct(private readonly ApplicationRepository $applicationRepository)
+    public function __construct(private readonly EntityManagerInterface $entityManager)
     {}
 
     protected function supports(string $attribute, mixed $subject): bool
@@ -38,14 +40,30 @@ class AssignmentVoter extends Voter
             return true;
         }
 
+        /** @var Assignment $assignment */
+        $assignment = $subject;
+
+        // Only allow applications on empty slots
+        $availableSlots = (int) $assignment->getAvailableDispositions();
+        if (0 < $availableSlots) {
+            $dispositions = $this
+                ->entityManager
+                ->getRepository(Disposition::class)
+                ->getCurrentByAssignment($assignment)
+            ;
+
+            return count($dispositions) < $availableSlots;
+        }
+
         // Only teamers without existing applications may apply to the assignment
         if (in_array('ROLE_TEAMER', $token->getRoleNames())) {
             /** @var User $user */
             $user = $token->getUser();
             $teamer = $user->getTeamer();
-            /** @var Assignment $assignment */
-            $assignment = $subject;
-            $application = $this->applicationRepository->findOneBy(['teamer' => $teamer, 'assignment' => $assignment]);
+            $application = $this
+                ->entityManager
+                ->getRepository(Application::class)
+                ->findOneBy(['teamer' => $teamer, 'assignment' => $assignment]);
 
             return null === $application;
         }
diff --git a/templates/teamer/index.html.twig b/templates/teamer/index.html.twig
index bd5aed0..c4aaecf 100644
--- a/templates/teamer/index.html.twig
+++ b/templates/teamer/index.html.twig
@@ -64,32 +64,31 @@
                     {% if assignment.applications|length %}
                         {% set application = assignment.applications[0] %}
                         {% if application.status == constant('App\\Entity\\Application::STATUS_REJECTED') %}
-                            {% set icon = 'close' %}
-                            {% set class = 'bg-gray-100 text-gray-800 hover:bg-gray-50' %}
-                            {% set url = path('app_teamer_assignment', { 'uuid': assignment.uuid, 'r': return_url() }) %}
-                            {% set label = 'Bewerbung abgelehnt' %}
+                            <a href="{{ path('app_teamer_assignment', { 'uuid': assignment.uuid, 'r': return_url() }) }}"
+                               class="btn btn--small flex items-center space-x-2 bg-gray-100 text-gray-800 hover:bg-gray-50">
+                                {{ icon('close', 'w-4 h-4 shrink-0') }}
+                                <span>Bewerbung abgelehnt</span>
+                            </a>
                         {% else %}
-                            {% set icon = 'hourglass' %}
-                            {% set class = 'bg-yellow-100 text-yellow-800 hover:bg-yellow-50' %}
-                            {% set url = path('app_teamer_assignment', { 'uuid': assignment.uuid, 'r': return_url() }) %}
-                            {% set label = 'in Bearbeitung' %}
+                            <a href="{{ path('app_teamer_assignment', { 'uuid': assignment.uuid, 'r': return_url() }) }}"
+                               class="btn btn--small flex items-center space-x-2 bg-yellow-100 text-yellow-800 hover:bg-yellow-50">
+                                {{ icon('hourglass', 'w-4 h-4 shrink-0') }}
+                                <span>in Bearbeitung</span>
+                            </a>
                         {% endif %}
                     {% elseif assignment.dispositions|length %}
-                        {% set icon = 'check' %}
-                        {% set class = 'bg-green-100 text-green-700 hover:bg-green-50' %}
-                        {% set url = path('app_teamer_disposition_detail', { 'uuid': assignment.dispositions[0].uuid }) %}
-                        {% set label = 'eingeteilt' %}
-                    {% else %}
-                        {% set icon = 'hand' %}
-                        {% set class = '' %}
-                        {% set url = path('app_teamer_assignment', { 'uuid': assignment.uuid, 'r': return_url() }) %}
-                        {% set label = 'bewerben' %}
+                        <a href="{{ path('app_teamer_disposition_detail', { 'uuid': assignment.dispositions[0].uuid }) }}"
+                           class="btn btn--small flex items-center space-x-2 bg-green-100 text-green-700 hover:bg-green-50">
+                            {{ icon('check', 'w-4 h-4 shrink-0') }}
+                            <span>eingeteilt</span>
+                        </a>
+                    {% elseif is_granted('APPLY', assignment) %}
+                        <a href="{{ path('app_teamer_assignment', { 'uuid': assignment.uuid, 'r': return_url() }) }}"
+                           class="btn btn--small flex items-center space-x-2">
+                            {{ icon('hand', 'w-4 h-4 shrink-0') }}
+                            <span>bewerben</span>
+                        </a>
                     {% endif %}
-                    <a href="{{ url }}"
-                       class="btn btn--small flex items-center space-x-2 {{ class }}">
-                        {{ icon(icon, 'w-4 h-4 shrink-0') }}
-                        <span>{{ label }}</span>
-                    </a>
                 </div>
                 {% set isBookmarked = teamer.bookmarks.contains(assignment) %}
                 <a href="{{ path('app_teamer_bookmark_toggle', { 'uuid': assignment.uuid, 'r': return_url() }) }}"