diff --git a/locallib.php b/locallib.php
index a528e42..44291b8 100644
--- a/locallib.php
+++ b/locallib.php
@@ -38,66 +38,6 @@ define('ATT_VIEW_NOTPRESENT', 6);
 define('ATT_SORT_LASTNAME', 1);
 define('ATT_SORT_FIRSTNAME', 2);
 
-class attendance_permissions {
-    private $cantake;
-    private $canchange;
-    private $canmanage;
-    private $canaccessallgroups;
-
-    private $cm;
-    private $context;
-
-    public function __construct($cm, $context) {
-        $this->cm = $cm;
-        $this->context = $context;
-    }
-
-    public function can_take() {
-        if (is_null($this->cantake)) {
-            $this->cantake = has_capability('mod/attendance:takeattendances', $this->context);
-        }
-
-        return $this->cantake;
-    }
-
-    public function can_take_session($groupid) {
-        if (!$this->can_take()) {
-            return false;
-        }
-
-        if ($groupid == attendance::SESSION_COMMON
-            || $this->can_access_all_groups()
-            || array_key_exists($groupid, groups_get_activity_allowed_groups($this->cm))) {
-            return true;
-        }
-
-        return false;
-    }
-
-    public function can_change() {
-        if (is_null($this->canchange)) {
-            $this->canchange = has_capability('mod/attendance:changeattendances', $this->context);
-        }
-
-        return $this->canchange;
-    }
-
-    public function can_manage() {
-        if (is_null($this->canmanage)) {
-            $this->canmanage = has_capability('mod/attendance:manageattendances', $this->context);
-        }
-
-        return $this->canmanage;
-    }
-
-    public function can_access_all_groups() {
-        if (is_null($this->canaccessallgroups)) {
-            $this->canaccessallgroups = has_capability('moodle/site:accessallgroups', $this->context);
-        }
-
-        return $this->canaccessallgroups;
-    }
-}
 
 class att_page_with_filter_controls {
     const SELECTOR_NONE         = 1;
@@ -492,9 +432,6 @@ class attendance {
     /** current page parameters */
     public $pageparams;
 
-    /** @var attendance_permissions permission of current user for attendance instance*/
-    public $perm;
-
     private $groupmode;
 
     private $statuses;
@@ -535,8 +472,6 @@ class attendance {
         }
 
         $this->pageparams = $pageparams;
-
-        $this->perm = new attendance_permissions($this->cm, $this->context);
     }
 
     public function get_group_mode() {
diff --git a/renderables.php b/renderables.php
index 56e6d20..053ca18 100644
--- a/renderables.php
+++ b/renderables.php
@@ -214,22 +214,18 @@ class attendance_manage_data implements renderable {
     /** @var int number of hidden sessions (sessions before $course->startdate)*/
     public $hiddensessionscount;
 
-    /** @var attendance_permissions permission of current user for attendance instance*/
-    public $perm;
-
     public $groups;
 
     public $hiddensesscount;
 
     /** @var attendance */
-    private $att;
+    public $att;
     /**
      * Prepare info about attendance sessions taking into account view parameters.
      *
      * @param attendance $att instance
      */
     public function __construct(attendance $att) {
-        $this->perm = $att->perm;
 
         $this->sessions = $att->get_filtered_sessions();
 
@@ -256,7 +252,6 @@ class attendance_take_data implements renderable {
     public $users;
 
     public $pageparams;
-    public $perm;
 
     public $groupmode;
     public $cm;
@@ -283,7 +278,6 @@ class attendance_take_data implements renderable {
         }
 
         $this->pageparams = $att->pageparams;
-        $this->perm = $att->perm;
 
         $this->groupmode = $att->get_group_mode();
         $this->cm = $att->cm;
@@ -438,7 +432,6 @@ class attendance_user_data implements renderable {
 }
 
 class attendance_report_data implements renderable {
-    public $perm;
     public $pageparams;
 
     public $users;
@@ -465,13 +458,11 @@ class attendance_report_data implements renderable {
 
     public $maxgrades = array();
 
-    private $att;
+    public $att;
 
     public function  __construct(attendance $att) {
         global $CFG;
 
-        $this->perm = $att->perm;
-
         $currenttime = time();
         if ($att->pageparams->view == ATT_VIEW_NOTPRESENT) {
             $att->pageparams->enddate = $currenttime;
diff --git a/renderer.php b/renderer.php
index d358aef..36134cf 100644
--- a/renderer.php
+++ b/renderer.php
@@ -249,7 +249,7 @@ class mod_attendance_renderer extends plugin_renderer_base {
         $date = userdate($sess->sessdate, get_string('strftimedmyw', 'attendance'));
         $time = $this->construct_time($sess->sessdate, $sess->duration);
         if ($sess->lasttaken > 0) {
-            if ($sessdata->perm->can_change()) {
+            if (has_capability('mod/attendance:changeattendances', $sessdata->att->context)) {
                 $url = $sessdata->url_take($sess->id, $sess->groupid);
                 $title = get_string('changeattendance', 'attendance');
 
@@ -262,13 +262,14 @@ class mod_attendance_renderer extends plugin_renderer_base {
                 $time = '<i>' . $time . '</i>';
             }
         } else {
-            if ($sessdata->perm->can_take()) {
+            if (has_capability('mod/attendance:takeattendances', $sessdata->att->context)) {
                 $url = $sessdata->url_take($sess->id, $sess->groupid);
                 $title = get_string('takeattendance', 'attendance');
                 $actions = $this->output->action_icon($url, new pix_icon('t/go', $title));
             }
         }
-        if ($sessdata->perm->can_manage()) {
+
+        if (has_capability('mod/attendance:manageattendances', $sessdata->att->context)) {
             $url = $sessdata->url_sessions($sess->id, att_sessions_page_params::ACTION_UPDATE);
             $title = get_string('editsession', 'attendance');
             $actions .= $this->output->action_icon($url, new pix_icon('t/edit', $title));
@@ -290,7 +291,7 @@ class mod_attendance_renderer extends plugin_renderer_base {
         $table->data[0][] = $this->output->help_icon('hiddensessions', 'attendance',
                 get_string('hiddensessions', 'attendance').': '.$sessdata->hiddensessionscount);
 
-        if ($sessdata->perm->can_manage()) {
+        if (has_capability('mod/attendance:manageattendances', $sessdata->att->context)) {
             $options = array(
                         att_sessions_page_params::ACTION_DELETE_SELECTED => get_string('delete'),
                         att_sessions_page_params::ACTION_CHANGE_DURATION => get_string('changeduration', 'attendance'));
@@ -371,7 +372,7 @@ class mod_attendance_renderer extends plugin_renderer_base {
         GLOBAL $CFG;
         
         $controls = '';
-
+        $context = context_module::instance($takedata->cm->id);
         $group = 0;
         if ($takedata->pageparams->grouptype != attendance::SESSION_COMMON) {
             $group = $takedata->pageparams->grouptype;
@@ -387,13 +388,13 @@ class mod_attendance_renderer extends plugin_renderer_base {
             } else {
                 $groups = $group;
             }
-            $users = get_users_by_capability(context_module::instance($takedata->cm->id), 'mod/attendance:canbelisted',
+            $users = get_users_by_capability($context, 'mod/attendance:canbelisted',
                             'u.id, u.firstname, u.lastname, u.email',
                             '', '', '', $groups,
                             '', false, true);
             $totalusers = count($users);
         } else {
-            $totalusers = count_enrolled_users(context_module::instance($takedata->cm->id), 'mod/attendance:canbelisted', $group);
+            $totalusers = count_enrolled_users($context, 'mod/attendance:canbelisted', $group);
         }
         $usersperpage = $takedata->pageparams->perpage;
         if (!empty($takedata->pageparams->page) && $takedata->pageparams->page && $totalusers && $usersperpage) {
@@ -412,7 +413,7 @@ class mod_attendance_renderer extends plugin_renderer_base {
 
         if ($takedata->pageparams->grouptype == attendance::SESSION_COMMON and
                 ($takedata->groupmode == VISIBLEGROUPS or
-                ($takedata->groupmode and $takedata->perm->can_access_all_groups()))) {
+                ($takedata->groupmode and has_capability('moodle/site:accessallgroups', $context)))) {
             $controls .= groups_print_activity_menu($takedata->cm, $takedata->url(), true);
         }
 
@@ -820,7 +821,11 @@ class mod_attendance_renderer extends plugin_renderer_base {
             $sesstext = userdate($sess->sessdate, get_string('strftimedm', 'attendance'));
             $sesstext .= html_writer::empty_tag('br');
             $sesstext .= userdate($sess->sessdate, '('.get_string('strftimehm', 'attendance').')');
-            if (is_null($sess->lasttaken) and $reportdata->perm->can_take() or $reportdata->perm->can_change()) {
+            $capabilities = array(
+                'mod/attendance:takeattendances',
+                'mod/attendance:changeattendances'
+            );
+            if (is_null($sess->lasttaken) and has_any_capability($capabilities, $reportdata->att->context)) {
                 $sesstext = html_writer::link($reportdata->url_take($sess->id, $sess->groupid), $sesstext);
             }
             $sesstext .= html_writer::empty_tag('br');
diff --git a/take.php b/take.php
index 055dd27..5a710f2 100644
--- a/take.php
+++ b/take.php
@@ -42,16 +42,20 @@ $course         = $DB->get_record('course', array('id' => $cm->course), '*', MUS
 $att            = $DB->get_record('attendance', array('id' => $cm->instance), '*', MUST_EXIST);
 
 require_login($course, true, $cm);
+$context = context_module::instance($cm->id);
+require_capability('mod/attendance:takeattendances', $context);
 
 $pageparams->group = groups_get_activity_group($cm, true);
 
 $pageparams->init($course->id);
 $att = new attendance($att, $cm, $course, $PAGE->context, $pageparams);
 
-if (!$att->perm->can_take_session($pageparams->grouptype)) {
-    $group = groups_get_group($pageparams->grouptype);
-    throw new moodle_exception('cannottakeforgroup', 'attendance', '', $group->name);
+$allowedgroups = groups_get_activity_allowed_groups($this->cm);
+if (!empty($pageparams->grouptype) && !array_key_exists($groupid, $allowedgroups)) {
+     $group = groups_get_group($pageparams->grouptype);
+     throw new moodle_exception('cannottakeforgroup', 'attendance', '', $group->name);
 }
+
 if (($formdata = data_submitted()) && confirm_sesskey()) {
     $att->take_from_form_data($formdata);
 }