diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -2757,6 +2757,7 @@
     'PhabricatorProjectMemberOfProjectEdgeType' => 'applications/project/edge/PhabricatorProjectMemberOfProjectEdgeType.php',
     'PhabricatorProjectMembersDatasource' => 'applications/project/typeahead/PhabricatorProjectMembersDatasource.php',
     'PhabricatorProjectMembersEditController' => 'applications/project/controller/PhabricatorProjectMembersEditController.php',
+    'PhabricatorProjectMembersPolicyRule' => 'applications/project/policyrule/PhabricatorProjectMembersOfProjectPolicyRule.php',
     'PhabricatorProjectMembersRemoveController' => 'applications/project/controller/PhabricatorProjectMembersRemoveController.php',
     'PhabricatorProjectMoveController' => 'applications/project/controller/PhabricatorProjectMoveController.php',
     'PhabricatorProjectNoProjectsDatasource' => 'applications/project/typeahead/PhabricatorProjectNoProjectsDatasource.php',
@@ -2767,6 +2768,7 @@
     'PhabricatorProjectProfileController' => 'applications/project/controller/PhabricatorProjectProfileController.php',
     'PhabricatorProjectProjectHasMemberEdgeType' => 'applications/project/edge/PhabricatorProjectProjectHasMemberEdgeType.php',
     'PhabricatorProjectProjectHasObjectEdgeType' => 'applications/project/edge/PhabricatorProjectProjectHasObjectEdgeType.php',
+    'PhabricatorProjectProjectMembersPolicyRule' => 'applications/project/policyrule/PhabricatorProjectProjectMembersPolicyRule.php',
     'PhabricatorProjectProjectPHIDType' => 'applications/project/phid/PhabricatorProjectProjectPHIDType.php',
     'PhabricatorProjectQuery' => 'applications/project/query/PhabricatorProjectQuery.php',
     'PhabricatorProjectRemoveHeraldAction' => 'applications/project/herald/PhabricatorProjectRemoveHeraldAction.php',
@@ -2787,7 +2789,6 @@
     'PhabricatorProjectViewController' => 'applications/project/controller/PhabricatorProjectViewController.php',
     'PhabricatorProjectWatchController' => 'applications/project/controller/PhabricatorProjectWatchController.php',
     'PhabricatorProjectsEditField' => 'applications/transactions/editfield/PhabricatorProjectsEditField.php',
-    'PhabricatorProjectsPolicyRule' => 'applications/policy/rule/PhabricatorProjectsPolicyRule.php',
     'PhabricatorProtocolAdapter' => 'infrastructure/daemon/bot/adapter/PhabricatorProtocolAdapter.php',
     'PhabricatorPygmentSetupCheck' => 'applications/config/check/PhabricatorPygmentSetupCheck.php',
     'PhabricatorQuery' => 'infrastructure/query/PhabricatorQuery.php',
@@ -6957,6 +6958,7 @@
     'PhabricatorProjectMemberOfProjectEdgeType' => 'PhabricatorEdgeType',
     'PhabricatorProjectMembersDatasource' => 'PhabricatorTypeaheadCompositeDatasource',
     'PhabricatorProjectMembersEditController' => 'PhabricatorProjectController',
+    'PhabricatorProjectMembersPolicyRule' => 'PhabricatorPolicyRule',
     'PhabricatorProjectMembersRemoveController' => 'PhabricatorProjectController',
     'PhabricatorProjectMoveController' => 'PhabricatorProjectController',
     'PhabricatorProjectNoProjectsDatasource' => 'PhabricatorTypeaheadDatasource',
@@ -6967,6 +6969,7 @@
     'PhabricatorProjectProfileController' => 'PhabricatorProjectController',
     'PhabricatorProjectProjectHasMemberEdgeType' => 'PhabricatorEdgeType',
     'PhabricatorProjectProjectHasObjectEdgeType' => 'PhabricatorEdgeType',
+    'PhabricatorProjectProjectMembersPolicyRule' => 'PhabricatorPolicyRule',
     'PhabricatorProjectProjectPHIDType' => 'PhabricatorPHIDType',
     'PhabricatorProjectQuery' => 'PhabricatorCursorPagedPolicyAwareQuery',
     'PhabricatorProjectRemoveHeraldAction' => 'PhabricatorProjectHeraldAction',
@@ -6990,7 +6993,6 @@
     'PhabricatorProjectViewController' => 'PhabricatorProjectController',
     'PhabricatorProjectWatchController' => 'PhabricatorProjectController',
     'PhabricatorProjectsEditField' => 'PhabricatorTokenizerEditField',
-    'PhabricatorProjectsPolicyRule' => 'PhabricatorPolicyRule',
     'PhabricatorProtocolAdapter' => 'Phobject',
     'PhabricatorPygmentSetupCheck' => 'PhabricatorSetupCheck',
     'PhabricatorQuery' => 'Phobject',
diff --git a/src/applications/policy/rule/PhabricatorPolicyRule.php b/src/applications/policy/rule/PhabricatorPolicyRule.php
--- a/src/applications/policy/rule/PhabricatorPolicyRule.php
+++ b/src/applications/policy/rule/PhabricatorPolicyRule.php
@@ -11,10 +11,6 @@
   const CONTROL_TYPE_NONE       = 'none';
 
   abstract public function getRuleDescription();
-  abstract public function applyRule(
-    PhabricatorUser $viewer,
-    $value,
-    PhabricatorPolicyInterface $object);
 
   public function willApplyRules(
     PhabricatorUser $viewer,
@@ -23,6 +19,11 @@
     return;
   }
 
+  abstract public function applyRule(
+    PhabricatorUser $viewer,
+    $value,
+    PhabricatorPolicyInterface $object);
+
   public function getValueControlType() {
     return self::CONTROL_TYPE_TEXT;
   }
@@ -35,7 +36,7 @@
    * Return `true` if this rule can be applied to the given object.
    *
    * Some policy rules may only operation on certain kinds of objects. For
-   * example, a "task author" rule
+   * example, a "task author" rule.
    */
   public function canApplyToObject(PhabricatorPolicyInterface $object) {
     return true;
@@ -43,6 +44,7 @@
 
   protected function getDatasourceTemplate(
     PhabricatorTypeaheadDatasource $datasource) {
+
     return array(
       'markup' => new AphrontTokenizerTemplateView(),
       'uri' => $datasource->getDatasourceURI(),
@@ -65,6 +67,7 @@
 
   public function getRequiredHandlePHIDsForSummary($value) {
     $phids = array();
+
     switch ($this->getValueControlType()) {
       case self::CONTROL_TYPE_TOKENIZER:
         $phids = $value;
@@ -86,7 +89,7 @@
   }
 
   /**
-   * Return true if the given value creates a rule with a meaningful effect.
+   * Return `true` if the given value creates a rule with a meaningful effect.
    * An example of a rule with no meaningful effect is a "users" rule with no
    * users specified.
    *
@@ -131,7 +134,7 @@
     $cache->setKey(self::getObjectPolicyCacheKey($object, $rule), $hint);
   }
 
-  protected function getTransactionHint(
+  final protected function getTransactionHint(
     PhabricatorPolicyInterface $object) {
 
     $cache = PhabricatorCaches::getRequestCache();
@@ -164,7 +167,7 @@
     return null;
   }
 
-  public function getObjectPolicyFullKey() {
+  final public function getObjectPolicyFullKey() {
     $key = $this->getObjectPolicyKey();
 
     if (!$key) {
diff --git a/src/applications/project/controller/PhabricatorProjectProfileController.php b/src/applications/project/controller/PhabricatorProjectProfileController.php
--- a/src/applications/project/controller/PhabricatorProjectProfileController.php
+++ b/src/applications/project/controller/PhabricatorProjectProfileController.php
@@ -92,7 +92,8 @@
         ->setName(pht('Edit Details'))
         ->setIcon('fa-pencil')
         ->setHref($this->getApplicationURI("details/{$id}/"))
-        ->setDisabled(!$can_edit));
+        ->setDisabled(!$can_edit)
+        ->setWorkflow(!$can_edit));
 
     $view->addAction(
       id(new PhabricatorActionView())
diff --git a/src/applications/project/policyrule/PhabricatorProjectMembersPolicyRule.php b/src/applications/project/policyrule/PhabricatorProjectMembersPolicyRule.php
new file mode 100644
--- /dev/null
+++ b/src/applications/project/policyrule/PhabricatorProjectMembersPolicyRule.php
@@ -0,0 +1,50 @@
+<?php
+
+final class PhabricatorProjectMembersPolicyRule extends PhabricatorPolicyRule {
+
+  public function getRuleDescription() {
+    return pht('members of project');
+  }
+
+  public function applyRule(
+    PhabricatorUser $viewer,
+    $value,
+    PhabricatorPolicyInterface $object) {
+
+    $edge_query = id(new PhabricatorEdgeQuery())
+      ->withSourcePHIDs(array($viewer->getPHID()))
+      ->withDestinationPHIDs(array($object->getPHID()))
+      ->withEdgeTypes(
+        array(
+          PhabricatorProjectMemberOfProjectEdgeType::EDGECONST,
+        ));
+    $edge_query->execute();
+
+    return (bool)$edge_query->getDestinationPHIDs();
+  }
+
+  public function getValueControlType() {
+    return self::CONTROL_TYPE_NONE;
+  }
+
+  public function canApplyToObject(PhabricatorPolicyInterface $object) {
+    return $object instanceof PhabricatorProject;
+  }
+
+  public function getObjectPolicyKey() {
+    return 'project.members';
+  }
+
+  public function getObjectPolicyName() {
+    return pht('Members');
+  }
+
+  public function getObjectPolicyIcon() {
+    return 'fa-users';
+  }
+
+  public function getPolicyExplanation() {
+    return pht('Members can take this action.');
+  }
+
+}
diff --git a/src/applications/policy/rule/PhabricatorProjectsPolicyRule.php b/src/applications/project/policyrule/PhabricatorProjectProjectMembersPolicyRule.php
rename from src/applications/policy/rule/PhabricatorProjectsPolicyRule.php
rename to src/applications/project/policyrule/PhabricatorProjectProjectMembersPolicyRule.php
--- a/src/applications/policy/rule/PhabricatorProjectsPolicyRule.php
+++ b/src/applications/project/policyrule/PhabricatorProjectProjectMembersPolicyRule.php
@@ -1,6 +1,7 @@
 <?php
 
-final class PhabricatorProjectsPolicyRule extends PhabricatorPolicyRule {
+final class PhabricatorProjectProjectMembersPolicyRule
+  extends PhabricatorPolicyRule {
 
   private $memberships = array();
 
diff --git a/src/applications/subscriptions/policyrule/PhabricatorSubscriptionsSubscribersPolicyRule.php b/src/applications/subscriptions/policyrule/PhabricatorSubscriptionsSubscribersPolicyRule.php
--- a/src/applications/subscriptions/policyrule/PhabricatorSubscriptionsSubscribersPolicyRule.php
+++ b/src/applications/subscriptions/policyrule/PhabricatorSubscriptionsSubscribersPolicyRule.php
@@ -6,26 +6,10 @@
   private $subscribed = array();
   private $sourcePHIDs = array();
 
-  public function getObjectPolicyKey() {
-    return 'subscriptions.subscribers';
-  }
-
-  public function getObjectPolicyName() {
-    return pht('Subscribers');
-  }
-
-  public function getPolicyExplanation() {
-    return pht('Subscribers can take this action.');
-  }
-
   public function getRuleDescription() {
     return pht('subscribers');
   }
 
-  public function canApplyToObject(PhabricatorPolicyInterface $object) {
-    return ($object instanceof PhabricatorSubscribableInterface);
-  }
-
   public function willApplyRules(
     PhabricatorUser $viewer,
     array $values,
@@ -118,4 +102,20 @@
     return self::CONTROL_TYPE_NONE;
   }
 
+  public function canApplyToObject(PhabricatorPolicyInterface $object) {
+    return $object instanceof PhabricatorSubscribableInterface;
+  }
+
+  public function getObjectPolicyKey() {
+    return 'subscriptions.subscribers';
+  }
+
+  public function getObjectPolicyName() {
+    return pht('Subscribers');
+  }
+
+  public function getPolicyExplanation() {
+    return pht('Subscribers can take this action.');
+  }
+
 }