diff --git a/modules/35_transport/edge_esm/bounds.gms b/modules/35_transport/edge_esm/bounds.gms
index 11789027666f0424024e46979b276126776befd2..a9acc453205cab0b7576c70f0cb5cf50a81dcd8b 100644
--- a/modules/35_transport/edge_esm/bounds.gms
+++ b/modules/35_transport/edge_esm/bounds.gms
@@ -5,4 +5,15 @@
 *** |  REMIND License Exception, version 1.0 (see LICENSE file).
 *** |  Contact: remind@pik-potsdam.de
 *** SOF ./modules/35_transport/edge_esm/bounds.gms
+
+*** lower bounds for synthetic fuels up to 2030
+$ifthen.ccu %CCU% == "on"
+v35_shSynSe.lo(t,regi)$(c_shGreenH2 >  0 AND t.val > 2021) = 0.05;
+v35_shSynSe.lo(t,regi)$(c_shGreenH2 >  0 AND t.val > 2025) = 0.1;
+v35_shSynSe.lo(t,regi)$(c_shGreenH2 >  0 AND t.val > 2030) = 0.20;
+$endif.ccu
+
+*** upper bound on bioliquids to 2020 value for all scenarios
+v35_shBioFe.up(t,regi)$(t.val > 2020) = 0.05;
+
 *** EOF ./modules/35_transport/edge_esm/bounds.gms