Modify access rules
diff --git a/project.config b/project.config
index d7529d1..6302e44 100644
--- a/project.config
+++ b/project.config
@@ -51,8 +51,10 @@
 	submit = group Google-Developer
 	submit = block group Anonymous Users
 	submit = block group Registered Users
+	label-Presubmit = -1..+1 group Coral-Admins
 [access "refs/meta/config"]
 	label-Code-Review = -2..+2 group Coral-Admins
+	label-Presubmit = -1..+1 group Coral-Admins
 [access "refs/tags/*"]
 	createSignedTag = group Google-Developer
 	push = group Google-Developer
@@ -72,6 +74,7 @@
 	value = 0 No score
 	value = +1 Verified
 	copyAllScoresIfNoCodeChange = true
+	defaultValue = 0
 [access "refs/for/*"]
 	addPatchSet = group Allowed-Developers
 	addPatchSet = group Google-Developer