diff --git a/definitions/common/c-1.table b/definitions/common/c-1.table
index 7c10a3f1c..6203887a9 100644
--- a/definitions/common/c-1.table
+++ b/definitions/common/c-1.table
@@ -75,6 +75,8 @@
 # 186 to 198 Reserved for centres in Region I which are not listed above
 # 199 to 209 Reserved for centres in Region V which are not in the list above
 195 wiix Indonesia (NMC)
+204 204  National Institute of Water and Atmospheric Research (NIWA - New Zealand)
+# 205-209 Reserved
 210 210  Frascati (ESA/ESRIN)
 211 211  Lannion
 212 212  Lisboa
@@ -98,4 +100,3 @@
 254 eums EUMETSAT Operation Centre
 # 255 Missing value
 255 consensus Consensus
-
diff --git a/definitions/common/c-11.table b/definitions/common/c-11.table
index 2c5ae684e..0b69758ac 100644
--- a/definitions/common/c-11.table
+++ b/definitions/common/c-11.table
@@ -75,6 +75,7 @@
 # 186 to 198 Reserved for centres in Region I which are not listed above
 # 199 to 209 Reserved for centres in Region V which are not in the list above
 195 wiix Indonesia (NMC)
+204 204  National Institute of Water and Atmospheric Research (NIWA - New Zealand)
 210 210  Frascati (ESA/ESRIN)
 211 211  Lannion
 212 212  Lisboa
diff --git a/definitions/grib2/local/2.0.table b/definitions/grib2/local/2.0.table
index 43e17eb3f..471911b5b 100644
--- a/definitions/grib2/local/2.0.table
+++ b/definitions/grib2/local/2.0.table
@@ -74,6 +74,7 @@
 # 186 to 198 Reserved for centres in Region I which are not listed above
 # 199 to 209 Reserved for centres in Region V which are not in the list above
 195 wiix Indonesia (NMC)
+204 204 National Institute of Water and Atmospheric Research (NIWA - New Zealand)
 210 210 Frascati (ESA/ESRIN)
 211 211 Lannion
 212 212 Lisboa
@@ -93,4 +94,3 @@
 251 251 Meteorological Cooperation on Operational NWP (MetCoOp)
 254 eums EUMETSAT Operation Centre
 1098 tigge TIGGE CENTRES
-
diff --git a/definitions/grib3/centre.table b/definitions/grib3/centre.table
index 09fb57e5a..6612d2601 100644
--- a/definitions/grib3/centre.table
+++ b/definitions/grib3/centre.table
@@ -74,6 +74,7 @@
 # 186 to 198 Reserved for centres in Region I which are not listed above
 # 199 to 209 Reserved for centres in Region V which are not in the list above
 195 wiix Indonesia (NMC)
+204 204  National Institute of Water and Atmospheric Research (NIWA - New Zealand)
 210 210  Frascati (ESA/ESRIN)
 211 211  Lannion
 212 212  Lisboa
diff --git a/definitions/grib3/local/2.0.table b/definitions/grib3/local/2.0.table
index 43e17eb3f..91bdf6d35 100644
--- a/definitions/grib3/local/2.0.table
+++ b/definitions/grib3/local/2.0.table
@@ -74,6 +74,7 @@
 # 186 to 198 Reserved for centres in Region I which are not listed above
 # 199 to 209 Reserved for centres in Region V which are not in the list above
 195 wiix Indonesia (NMC)
+204 204  National Institute of Water and Atmospheric Research (NIWA - New Zealand)
 210 210 Frascati (ESA/ESRIN)
 211 211 Lannion
 212 212 Lisboa
@@ -93,4 +94,3 @@
 251 251 Meteorological Cooperation on Operational NWP (MetCoOp)
 254 eums EUMETSAT Operation Centre
 1098 tigge TIGGE CENTRES
-