diff --git a/definitions/grib2/grib2LocalSectionNumber.98.table b/definitions/grib2/grib2LocalSectionNumber.98.table
index dcb8e84cd..26d0b1ec0 100644
--- a/definitions/grib2/grib2LocalSectionNumber.98.table
+++ b/definitions/grib2/grib2LocalSectionNumber.98.table
@@ -21,6 +21,7 @@
 39 39 4DVar model errors for long window 4Dvar system
 41 41 The Flood Awareness System
 42 42 Lead Centre for Wave Forecast Verification
+43 43 EERIE project MARS labelling
 60 60 Ocean data analysis date and analysis time
 192 192 Multiple ECMWF local definitions
 300 300 Multi-dimensional parameters (deprecated)
diff --git a/definitions/grib2/local.98.43.def b/definitions/grib2/local.98.43.def
new file mode 100644
index 000000000..008a528eb
--- /dev/null
+++ b/definitions/grib2/local.98.43.def
@@ -0,0 +1,20 @@
+# Class ed EERIE project climate keywords
+
+# CMIP related activity keyword
+codetable[2] activity "grib2/destine_activity.table" ;
+alias mars.activity = activity;
+
+# CMIP related experiment keyword
+codetable[2] experiment "grib2/destine_experiment.table" ;
+alias mars.experiment = experiment;
+
+# Climate run realization keyword, which relates to an initial condition perturbation
+unsigned[1] realization = 255 ;
+alias mars.realization = realization;
+
+# Remove mars domain from this data
+unalias mars.domain;
+
+# Add some padding just in case we want more keys in the future
+pad padding_loc43(30);
+
diff --git a/definitions/mars/class.table b/definitions/mars/class.table
index efe2be6b1..bb740e63a 100644
--- a/definitions/mars/class.table
+++ b/definitions/mars/class.table
@@ -50,6 +50,7 @@
 49 gh C3S Global hydrology
 50 ci CERISE project
 51 ai Operational AIFS
+52 ed EERIE project
 99 te Test
 100 at Austria
 101 be Belgium
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index e282ee85a..31a644601 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -144,6 +144,7 @@ if( HAVE_BUILD_TOOLS )
         grib_ecc-1671
         grib_ecc-1708
         grib_ecc-1691
+        grib_ecc-1766
         bufr_ecc-1028
         bufr_ecc-1195
         bufr_ecc-1259
diff --git a/tests/grib_ecc-1766.sh b/tests/grib_ecc-1766.sh
new file mode 100755
index 000000000..79e273b1d
--- /dev/null
+++ b/tests/grib_ecc-1766.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+# (C) Copyright 2005- ECMWF.
+#
+# This software is licensed under the terms of the Apache Licence Version 2.0
+# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
+# 
+# In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
+# virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
+#
+
+. ./include.ctest.sh
+
+REDIRECT=/dev/null
+
+# ECC-1766: EERIE project metadata support
+
+label="grib_ecc-1766_test"
+temp_grib=temp.$label.grib
+eerie_sample=temp.$label.eerie.grib
+sample_grib2=$ECCODES_SAMPLES_PATH/GRIB2.tmpl
+
+tablesVersionLatest=$( ${tools_dir}/grib_get -p tablesVersionLatest $sample_grib2 )
+
+# Setup GRIB message with MARS keys
+# Set latest tables version and add local section with MARS labeling
+${tools_dir}/grib_set -s tablesVersion=$tablesVersionLatest,setLocalDefinition=1 $sample_grib2 $temp_grib
+
+# Then change to EERIE project GRIB message --> grib2LocalSectionNumber=43
+${tools_dir}/grib_set -s grib2LocalSectionNumber=43,class=ed $temp_grib $eerie_sample
+
+# Check EERIE related keys are present and correct
+grib_check_key_exists $eerie_sample activity,experiment,realization
+grib_check_key_equals $eerie_sample "activity,experiment,realization" "0 0 255"
+
+# Check domain key is unaliased
+[ $( ${tools_dir}/grib_get -f -p mars.domain $eerie_sample ) = "not_found" ]
+
+# Check an example where a few additional things are set
+${tools_dir}/grib_set -s activity=1,experiment=1,realization=1 $eerie_sample $temp_grib
+
+grib_check_key_equals $temp_grib "activity,experiment,realization" "1 1 1"
+grib_check_key_equals $temp_grib "activity:s,experiment:s" "CMIP6 hist"
+
+# Clean up
+rm -f $temp_grib $eerie_sample