$_SESSION['plc']['person'] = $this->person;
$_SESSION['plc']['alt_person'] = $this->alt_person;
$_SESSION['plc']['alt_auth'] = $this->alt_auth;
$_SESSION['plc']['person'] = $this->person;
$_SESSION['plc']['alt_person'] = $this->alt_person;
$_SESSION['plc']['alt_auth'] = $this->alt_auth;