diff --git a/booking.helper.inc b/booking.helper.inc
index 75eef5a..2aa9e88 100644
--- a/booking.helper.inc
+++ b/booking.helper.inc
@@ -101,6 +101,18 @@ function _valid_phone_number($input)
     */
 }
 
+function _valid_australian_mobile_number($input)
+{
+    if (preg_match('/^\s*(?:\+61|61|0061|0)(\d{3})\s*(\d{3})\s*(\d{3})\s*$/', $input, $matches))
+    {
+      watchdog('booking', 'Australian Mobile Number "!passnum" validates since it passed our regexp',
+              array('!passnum' => $input));	
+			return TRUE;								
+    } 
+		else
+			return FALSE;
+}
+
 
 /**
  * Helper function to check whether the number of registrations for the current event have reached their defined maximum size
diff --git a/booking.regn_form.inc b/booking.regn_form.inc
index da6b5e5..9eb66fc 100644
--- a/booking.regn_form.inc
+++ b/booking.regn_form.inc
@@ -1177,8 +1177,13 @@ function _booking_validate($node, &$form_state) {
 	    form_set_error('booking_mobile', t('You must enter at least one phone number, either a mobile phone or a home phone number.'));
 	if (($form_state['booking_phone'] != '' ) && (!_valid_phone_number($form_state['booking_phone'])))
 	    form_set_error('booking_phone', t('You have entered an invalid home phone number.'));
-	if (($form_state['booking_mobile'] != '' ) && (!_valid_phone_number($form_state['booking_mobile'])))
-	    form_set_error('booking_mobile', t('You have entered an invalid mobile phone number.'));
+	if (($form_state['booking_mobile'] != '' ) && (!_valid_phone_number($form_state['booking_mobile']))) 
+		form_set_error('booking_mobile', t('You have entered an invalid mobile phone number.'));
+	
+	//verify an australian mobile number is entered correctly if applicable
+	if (($form_state['booking_mobile'] != '' ) && ($form_state['booking_country'] == 'Australia') && (!_valid_australian_mobile_number($form_state['booking_mobile'])))
+		form_set_error('booking_mobile', t('You have entered an invalid mobile phone number.'));	
+	    
 
 	//verify guardian phone number(s)
 	if (($form_state['booking_guardian_phone'] != '' ) && (!_valid_phone_number($form_state['booking_guardian_phone'])))