diff --git a/definitions/grib1/local/ecmf/3.table b/definitions/grib1/local/ecmf/3.table
index 767213f12..fb5b07081 100644
--- a/definitions/grib1/local/ecmf/3.table
+++ b/definitions/grib1/local/ecmf/3.table
@@ -45,6 +45,8 @@
 # 161-199Reserved
 200 sfc Entire atmosphere considered as a single layer 0 (2 octets)
 201 201 Entire ocean considered as a single layer 0 (2 octets)
+202 al Abstract Single Level
+203 al Abstract Multiple Level
 # 202-209 Reserved
 210 pl Isobaric surface (Pa) (ECMWF extension)
 # 211-254 Reserved for local use
diff --git a/definitions/grib1/section.1.def b/definitions/grib1/section.1.def
index c2dd5c5e0..3e8f936a8 100644
--- a/definitions/grib1/section.1.def
+++ b/definitions/grib1/section.1.def
@@ -105,7 +105,8 @@ if( indicatorOfTypeOfLevel == 109 ||
     indicatorOfTypeOfLevel == 100 ||
     indicatorOfTypeOfLevel == 110 ||
     indicatorOfTypeOfLevel == 113 ||
-    indicatorOfTypeOfLevel == 117)
+    indicatorOfTypeOfLevel == 117 ||
+    indicatorOfTypeOfLevel == 203)
 {
     alias mars.levelist = level;
 }
diff --git a/definitions/grib1/typeOfLevel.def b/definitions/grib1/typeOfLevel.def
index ccf74d5be..1e7219d8e 100644
--- a/definitions/grib1/typeOfLevel.def
+++ b/definitions/grib1/typeOfLevel.def
@@ -34,3 +34,5 @@
 'depthBelowSea' = {indicatorOfTypeOfLevel=160;}
 'entireAtmosphere' = {indicatorOfTypeOfLevel=200;}
 'entireOcean' = {indicatorOfTypeOfLevel=201;}
+'abstractSingleLevel' = {indicatorOfTypeOfLevel=202;}
+'abstractMultipleLevels' = {indicatorOfTypeOfLevel=203;}