How about a simpler version:
 
...
    8:00 1:00 WST 1992 Mar Sun>=1 2:00s
    8:00 - WST 2006 Dec Sun>=1 2:00s
    8:00 - AS 2009 Mar lastSun 2:00s
    8:00 - WST
Regards,
- Jesper
 
From: Eric Ulevik [mailto:eulevik@gmail.com]
Sent: Martes, 21 de Noviembre de 2006 19:46
To: tz@lecserver.nci.nih.gov
Subject: Re: Western Australia planning for Daylight SavingTimestarting1December 2006
 ... 
# This file also includes Pacific islands.
@@ -37,7 +37,14 @@
                         8:00   1:00    WST     1984 Mar Sun>=1 2:00s
                         8:00   -       WST     1991 Nov 17 2:00s
                         8:00   1:00    WST     1992 Mar Sun>=1 2:00s
-                        8:00   -       WST
+                        8:00   -       WST     2006 Dec 3 2:00s
+                        8:00   1:00    WST     2007 Mar lastSun 2:00s
+                        8:00   -       WST     2007 Oct lastSun 2:00s
+                        8:00   1:00    WST     2008 Mar lastSun 2:00s
+                        8:00   -       WST     2008 Oct lastSun 2:00s
+                        8:00   1:00    WST     2009 Mar lastSun 2:00s
+                        8:00   -       WST
+