implement fetch_pending()
diff --git a/planetstack/observer/steps/sync_sites.py b/planetstack/observer/steps/sync_sites.py
index 1f7a0f8..ece34af 100644
--- a/planetstack/observer/steps/sync_sites.py
+++ b/planetstack/observer/steps/sync_sites.py
@@ -7,6 +7,10 @@
 class SyncSites(OpenStackSyncStep):
 	provides=[Site]
 	requested_interval=0
+
+    def fetch_pending(self):
+        return Site.objects.filter(Q(enacted__lt=F('updated')) | Q(enacted=None))
+
 	def sync_record(self, site):
 		save_site = False
 		if not site.tenant_id: