diff --git a/application/src/Domain/LawManagement/LawPermissionCheckerService.php b/application/src/Domain/LawManagement/LawPermissionCheckerService.php
new file mode 100644
index 0000000..e2412cc
--- /dev/null
+++ b/application/src/Domain/LawManagement/LawPermissionCheckerService.php
@@ -0,0 +1,117 @@
+<?php
+
+namespace App\Domain\LawManagement;
+
+use App\Entity\Source\SourceInterface;
+use PhpCollection\CollectionInterface;
+use Doctrine\Common\Collections\ArrayCollection;
+use App\Entity\Meta\RightInterface;
+use Doctrine\Common\Collections\Collection;
+
+/**
+ * @todo Implement checking by operation sources
+ *
+ * @author kevinfrantz
+ */
+class LawPermissionCheckerService implements LawPermissionCheckerServiceInterface
+{
+    /**
+     * @var SourceInterface
+     */
+    private $clientSource;
+
+    /**
+     * @var SourceInterface
+     */
+    private $requestedSource;
+
+    /**
+     * @var
+     */
+    private $permissionType;
+
+    private function getRightsByPermission(Collection $rights): Collection
+    {
+        $result = new ArrayCollection();
+        /*
+         * @var RightInterface
+         */
+        foreach ($rights as $right) {
+            if ($right->getType() === $this->permissionType) {
+                $result->add($right);
+            }
+        }
+
+        return $result;
+    }
+
+    private function getRightsByClient(Collection $rights): Collection
+    {
+        $result = new ArrayCollection();
+        /*
+         * @var RightInterface
+         */
+        foreach ($rights as $right) {
+            if ($right->getReciever() === $this->clientSource) {
+                $result->add($right);
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * @todo Implement
+     *
+     * @return CollectionInterface the sources to which the client belongs to
+     */
+    private function getAllClientMemberships(): Collection
+    {
+    }
+
+    private function sortByPriority(Collection $rights): Collection
+    {
+    }
+
+    /**
+     * @todo Implement priority function for locking
+     *
+     * @param CollectionInterface $rights the rights which exist
+     *
+     * @return bool
+     */
+    private function isGranted(CollectionInterface $rights): bool
+    {
+        /*
+         * @var RightInterface
+         */
+        foreach ($rights as $right) {
+            if ($clientSources->contains($right)) {
+            }
+        }
+
+        return $result;
+    }
+
+    public function checkPermission(): bool
+    {
+        $requestedSourceRights = $this->requestedSource->getLaw()->getRights();
+        $rightsByPermission = $this->getRightsByPermission($requestedSourceRights);
+        $rightsbyClient = $this->getRightsByClient($rightsByPermission);
+    }
+
+    public function setClientSource(SourceInterface $clientSource): void
+    {
+        $this->clientSource = $clientSource;
+    }
+
+    public function setRequestedSource(SourceInterface $requestedSource): void
+    {
+        $this->requestedSource = $requestedSource;
+    }
+
+    public function setType(string $type): void
+    {
+        $this->permissionType = $type;
+    }
+}
diff --git a/application/src/Domain/LawManagement/LawPermissionCheckerServiceInterface.php b/application/src/Domain/LawManagement/LawPermissionCheckerServiceInterface.php
new file mode 100644
index 0000000..b8cc554
--- /dev/null
+++ b/application/src/Domain/LawManagement/LawPermissionCheckerServiceInterface.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Domain\LawManagement;
+
+use App\Entity\Source\SourceInterface;
+
+/**
+ * Allows to check if a source has rights on a source.
+ *
+ * @author kevinfrantz
+ */
+interface LawPermissionCheckerServiceInterface
+{
+    public function setRequestedSource(SourceInterface $requestedSource): void;
+
+    public function setClientSource(SourceInterface $clientSource): void;
+
+    public function checkPermission(): bool;
+
+    /**
+     * Sets the permission type.
+     *
+     * @param string $type
+     */
+    public function setType(string $type): void;
+}