diff --git a/planetstack/model_policies/model_policy_Slice.py b/planetstack/model_policies/model_policy_Slice.py
new file mode 100644
index 0000000..5d66903
--- /dev/null
+++ b/planetstack/model_policies/model_policy_Slice.py
@@ -0,0 +1,23 @@
+from core.models import *
+
+def handle(slice):
+	site_deployments = SiteDeployments.objects.all()
+	site_deploy_lookup = defaultdict(list)
+	for site_deployment in site_deployments:
+		site_deploy_lookup[site_deployment.site].append(site_deployment.deployment)
+	
+	slice_deployments = SliceDeployments.objects.all()
+	slice_deploy_lookup = defaultdict(list)
+	for slice_deployment in slice_deployments:
+		slice_deploy_lookup[slice_deployment.slice].append(slice_deployment.deployment)
+	
+	all_deployments = Deployment.objects.all() 
+	# slices are added to all deployments for now
+	expected_deployments = all_deployments
+	#expected_deployments = site_deploy_lookup[slice.site]
+	for expected_deployment in expected_deployments:
+		if slice not in slice_deploy_lookup or \
+		   expected_deployment not in slice_deploy_lookup[slice]:
+			sd = SliceDeployments(slice=slice, deployment=expected_deployment)
+			sd.save()
+