diff --git a/CHANGELOG.md b/CHANGELOG.md
index 650e9df00b..2ef775bf19 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### removed
 - **31_past** removed `grasslands_apr22` realization
+- **13_tau** removed interface `fm_pastr_tau_hist`
 
 ### fixed
 - **11_costs** changed equation to fix bug in total water cost calculation
diff --git a/modules/13_tc/endo_jan22/input.gms b/modules/13_tc/endo_jan22/input.gms
index f9a37ab622..b74ae99b53 100644
--- a/modules/13_tc/endo_jan22/input.gms
+++ b/modules/13_tc/endo_jan22/input.gms
@@ -45,7 +45,7 @@ $include "./modules/13_tc/input/f13_tau_historical.csv"
 $offdelim
 ;
 
-table fm_pastr_tau_hist(t_all,h) Historical managed pasture tau (1)
+table f13_pastr_tau_hist(t_all,h) Historical managed pasture tau (1)
 $ondelim
 $include "./modules/13_tc/input/f13_pastr_tau_hist.csv"
 $offdelim
diff --git a/modules/13_tc/endo_jan22/preloop.gms b/modules/13_tc/endo_jan22/preloop.gms
index b96d0b99a3..31cbb0fe18 100644
--- a/modules/13_tc/endo_jan22/preloop.gms
+++ b/modules/13_tc/endo_jan22/preloop.gms
@@ -16,5 +16,5 @@ loop(t,
 );
 
 pcm_tau(h,"crop")        = fm_tau1995(h);
-pcm_tau(h,"pastr")       = fm_pastr_tau_hist("y1995",h);
+pcm_tau(h,"pastr")       = f13_pastr_tau_hist("y1995",h);
 pc13_tcguess(h,tautype)  = f13_tcguess(h);
diff --git a/modules/13_tc/endo_jan22/presolve.gms b/modules/13_tc/endo_jan22/presolve.gms
index f769dc97ba..9e37d6aae3 100644
--- a/modules/13_tc/endo_jan22/presolve.gms
+++ b/modules/13_tc/endo_jan22/presolve.gms
@@ -10,7 +10,7 @@ pc13_land(i,"pastr") = sum(cell(i,j),pcm_land(j,"past"));
 pc13_land(i,"crop") = sum(cell(i,j),pcm_land(j,"crop"));
 
 if (sum(sameas(t_past,t),1) = 1 AND s13_ignore_tau_historical = 0,
-  vm_tau.lo(h,"pastr") =   fm_pastr_tau_hist(t,h);
+  vm_tau.lo(h,"pastr") =   f13_pastr_tau_hist(t,h);
   vm_tau.lo(h,"crop") =    f13_tau_historical(t,h);
 else
   vm_tau.lo(h, tautype) =    pcm_tau(h, tautype);
diff --git a/modules/13_tc/exo/input.gms b/modules/13_tc/exo/input.gms
index f5743743e1..39b97b6336 100644
--- a/modules/13_tc/exo/input.gms
+++ b/modules/13_tc/exo/input.gms
@@ -34,7 +34,7 @@ $include "./modules/13_tc/input/f13_tau_scenario.csv"
 $offdelim
 ;
 
-table fm_pastr_tau_hist(t_all,h) Historical managed pasture tau (1)
+table f13_pastr_tau_hist(t_all,h) Historical managed pasture tau (1)
 $ondelim
 $include "./modules/13_tc/input/f13_pastr_tau_hist.csv"
 $offdelim
diff --git a/modules/13_tc/exo/preloop.gms b/modules/13_tc/exo/preloop.gms
index 6c62b24803..0d26231054 100644
--- a/modules/13_tc/exo/preloop.gms
+++ b/modules/13_tc/exo/preloop.gms
@@ -16,4 +16,4 @@ loop(t,
 );
 
 pcm_tau(h,"crop") = fm_tau1995(h);
-pcm_tau(h,"pastr") = fm_pastr_tau_hist("y1995",h);
+pcm_tau(h,"pastr") = f13_pastr_tau_hist("y1995",h);
diff --git a/modules/31_past/endo_jun13/not_used.txt b/modules/31_past/endo_jun13/not_used.txt
deleted file mode 100644
index 2c2efa6670..0000000000
--- a/modules/31_past/endo_jun13/not_used.txt
+++ /dev/null
@@ -1,4 +0,0 @@
-name,type,reason
-vm_tau,input,questionnaire
-fm_pastr_tau_hist,input,questionnaire
-sm_fix_cc, input, not needed
diff --git a/modules/31_past/static/not_used.txt b/modules/31_past/static/not_used.txt
index 6bd07855f0..3b1a814ba5 100644
--- a/modules/31_past/static/not_used.txt
+++ b/modules/31_past/static/not_used.txt
@@ -2,6 +2,3 @@ name,type,reason
 vm_prod, input, not needed
 vm_yld, input, not needed
 pm_land_conservation,input,questionnaire
-vm_tau,input,questionnaire
-fm_pastr_tau_hist,input,questionnaire
-sm_fix_cc, input, not needed