diff --git a/mod/assign/db/upgrade.php b/mod/assign/db/upgrade.php
index 6b2797cfd86..53302a8a197 100644
--- a/mod/assign/db/upgrade.php
+++ b/mod/assign/db/upgrade.php
@@ -200,7 +200,7 @@ function xmldb_assign_upgrade($oldversion) {
     // Moodle v3.1.0 release upgrade line.
     // Put any upgrade step following this.
 
-    if ($oldversion < 2016070402) {
+    if ($oldversion < 2016100301) {
 
         // Define table assign_overrides to be created.
         $table = new xmldb_table('assign_overrides');
@@ -227,7 +227,7 @@ function xmldb_assign_upgrade($oldversion) {
         }
 
         // Assign savepoint reached.
-        upgrade_mod_savepoint(true, 2016070402, 'assign');
+        upgrade_mod_savepoint(true, 2016100301, 'assign');
     }
 
     return true;
diff --git a/mod/assign/externallib.php b/mod/assign/externallib.php
index a11e6cc0658..2515ea2d9a8 100644
--- a/mod/assign/externallib.php
+++ b/mod/assign/externallib.php
@@ -403,6 +403,8 @@ class mod_assign_external extends external_api {
                     }
 
                     $assign = new assign($context, null, null);
+                    // Update assign with override information.
+                    $assign->update_effective_access($USER->id);
 
                     // Get configurations for only enabled plugins.
                     $plugins = $assign->get_submission_plugins();
@@ -433,12 +435,12 @@ class mod_assign_external extends external_api {
                         'sendnotifications' => $module->sendnotifications,
                         'sendlatenotifications' => $module->sendlatenotifications,
                         'sendstudentnotifications' => $module->sendstudentnotifications,
-                        'duedate' => $module->duedate,
-                        'allowsubmissionsfromdate' => $module->allowsubmissionsfromdate,
+                        'duedate' => $assign->get_instance()->duedate,
+                        'allowsubmissionsfromdate' => $assign->get_instance()->allowsubmissionsfromdate,
                         'grade' => $module->grade,
                         'timemodified' => $module->timemodified,
                         'completionsubmit' => $module->completionsubmit,
-                        'cutoffdate' => $module->cutoffdate,
+                        'cutoffdate' => $assign->get_instance()->cutoffdate,
                         'teamsubmission' => $module->teamsubmission,
                         'requireallteammemberssubmit' => $module->requireallteammemberssubmit,
                         'teamsubmissiongroupingid' => $module->teamsubmissiongroupingid,
@@ -1788,7 +1790,7 @@ class mod_assign_external extends external_api {
 
         $notices = array();
 
-        $assign->update_effective_access($USER->id);
+        $assignment->update_effective_access($USER->id);
         if (!$assignment->submissions_open($USER->id)) {
             $notices[] = get_string('duedatereached', 'assign');
         } else {
diff --git a/mod/assign/version.php b/mod/assign/version.php
index 6f0ee67a7b7..a9b4b152d1b 100644
--- a/mod/assign/version.php
+++ b/mod/assign/version.php
@@ -25,6 +25,6 @@
 defined('MOODLE_INTERNAL') || die();
 
 $plugin->component = 'mod_assign'; // Full name of the plugin (used for diagnostics).
-$plugin->version  = 2016100300;    // The current module version (Date: YYYYMMDDXX).
+$plugin->version  = 2016100301;    // The current module version (Date: YYYYMMDDXX).
 $plugin->requires = 2016051900;    // Requires this Moodle version.
 $plugin->cron     = 60;