diff -aNur tzdata2006g.orig/southamerica tzdata2006g/southamerica
--- tzdata2006g.orig/southamerica	2006-08-21 10:56:14.000000000 -0300
+++ tzdata2006g/southamerica	2006-10-02 00:45:45.000000000 -0300
@@ -1064,6 +1064,13 @@
 # 02:00 local time, official time in Uruguay will be at GMT -2.
 Rule	Uruguay	2005	only	-	Oct	 9	 2:00	1:00	S
 Rule	Uruguay	2006	only	-	Mar	12	 2:00	0	-
+# From Ricardo Mendez (2006-02-10):
+# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
+# This means that from first Sunday in October at 02:00 local time, until second Sunday in March at
+# 02:00 local time, official time in Uruguay will be at GMT -2.
+Rule	Uruguay	2006	max 	-	Oct	Sun>=1 	 2:00	1:00	S
+Rule	Uruguay	2007	max 	-	Mar	Sun>=8	 2:00	0	-
+
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone America/Montevideo	-3:44:44 -	LMT	1898 Jun 28
 			-3:44:44 -	MMT	1920 May  1	# Montevideo MT