diff --git a/config/config.default.yaml b/config/config.default.yaml
index f500c8bb..7f40db20 100644
--- a/config/config.default.yaml
+++ b/config/config.default.yaml
@@ -760,10 +760,7 @@ solving:
   agg_p_nom_limits:
     agg_offwind: false
     include_existing: false
-    years:
-      2030: data/agg_p_nom_minmax.csv
-      2040: data/agg_p_nom_minmax.csv
-      2050: data/agg_p_nom_minmax.csv
+    file: data/agg_p_nom_minmax.csv
 
   constraints:
     CCL: false
diff --git a/data/agg_p_nom_minmax.csv b/data/agg_p_nom_minmax.csv
index 111215bc..7a6a7f73 100644
--- a/data/agg_p_nom_minmax.csv
+++ b/data/agg_p_nom_minmax.csv
@@ -1,31 +1,32 @@
-country,carrier,min,max
-DE,onwind,0.1,
-DE,offwind-ac,0.1,
-DE,offwind-dc,0.1,
-DE,solar,0.2,
-LU,onwind,,
-LU,solar,,
-NL,onwind,,
-NL,offwind-ac,,
-NL,offwind-dc,,
-NL,solar,,
-GB,onwind,,
-GB,offwind-ac,,
-GB,offwind-dc,,
-GB,solar,,
-IE,onwind,,
-IE,offwind-ac,,
-IE,offwind-dc,,
-IE,solar,,
-FR,onwind,,
-FR,offwind-ac,,
-FR,offwind-dc,,
-FR,solar,,
-DK,onwind,,
-DK,offwind-ac,,
-DK,offwind-dc,,
-DK,solar,,
-BE,onwind,,
-BE,offwind-ac,,
-BE,offwind-dc,,
-BE,solar,,
+,,2030,2030,2040,2040,2050,2050
+country,carrier,min,max,min,max,min,max
+DE,onwind,0.1,,0.1,,0.1,
+DE,offwind-ac,0.1,,0.1,,0.1,
+DE,offwind-dc,0.1,,0.1,,0.1,
+DE,solar,0.2,,0.2,,0.2,
+LU,onwind,,,,,,
+LU,solar,,,,,,
+NL,onwind,,,,,,
+NL,offwind-ac,,,,,,
+NL,offwind-dc,,,,,,
+NL,solar,,,,,,
+GB,onwind,,,,,,
+GB,offwind-ac,,,,,,
+GB,offwind-dc,,,,,,
+GB,solar,,,,,,
+IE,onwind,,,,,,
+IE,offwind-ac,,,,,,
+IE,offwind-dc,,,,,,
+IE,solar,,,,,,
+FR,onwind,,,,,,
+FR,offwind-ac,,,,,,
+FR,offwind-dc,,,,,,
+FR,solar,,,,,,
+DK,onwind,,,,,,
+DK,offwind-ac,,,,,,
+DK,offwind-dc,,,,,,
+DK,solar,,,,,,
+BE,onwind,,,,,,
+BE,offwind-ac,,,,,,
+BE,offwind-dc,,,,,,
+BE,solar,,,,,,
\ No newline at end of file
diff --git a/doc/configtables/solving.csv b/doc/configtables/solving.csv
index f9619504..2fc7999d 100644
--- a/doc/configtables/solving.csv
+++ b/doc/configtables/solving.csv
@@ -17,7 +17,7 @@ options,,,
 agg_p_nom_limits,,,Configure per carrier generator nominal capacity constraints for individual countries if ``'CCL'`` is in ``{opts}`` wildcard.
 -- agg_offwind,bool,"{'true','false'}",Aggregate together all the types of offwind when writing the constraint. Default is false.
 -- include_existing,bool,"{'true','false'}",Take existing capacities into account when writing the constraint. Default is false.
--- years,-,Dictionary with planning horizons as key and path as value,Reference to ``.csv`` file for each planning horizon. Defaults to ``data/agg_p_nom_minmax.csv``.
+-- file,file,path,Reference to ``.csv`` file specifying per carrier generator nominal capacity constraints for individual countries and planning horizons. Defaults to ``data/agg_p_nom_minmax.csv``.
 constraints ,,,
 -- CCL,bool,"{'true','false'}",Add minimum and maximum levels of generator nominal capacity per carrier for individual countries. These can be specified in the file linked at ``electricity: agg_p_nom_limits`` in the configuration. File defaults to ``data/agg_p_nom_minmax.csv``.
 -- EQ,bool/string,"{'false',`n(c| )``; i.e. ``0.5``-``0.7c``}",Require each country or node to on average produce a minimal share of its total consumption itself. Example: ``EQ0.5c`` demands each country to produce on average at least 50% of its consumption; ``EQ0.5`` demands each node to produce on average at least 50% of its consumption.
diff --git a/scripts/solve_network.py b/scripts/solve_network.py
index 2d099068..e0914b9f 100644
--- a/scripts/solve_network.py
+++ b/scripts/solve_network.py
@@ -422,8 +422,9 @@ def add_CCL_constraints(n, config):
         agg_p_nom_limits: data/agg_p_nom_minmax.csv
     """
     agg_p_nom_minmax = pd.read_csv(
-        config["solving"]["agg_p_nom_limits"]["years"][int(snakemake.wildcards.planning_horizons)], index_col=[0, 1]
-    )
+        config["solving"]["agg_p_nom_limits"]["file"],
+        index_col=[0, 1], header=[0, 1]
+    )[snakemake.wildcards.planning_horizons]
     logger.info("Adding generation capacity constraints per carrier and country")
     p_nom = n.model["Generator-p_nom"]