diff --git a/src/ML-PACE/pair_pace_extrapolation.cpp b/src/ML-PACE/pair_pace_extrapolation.cpp
index c17671d02b..053918ee82 100644
--- a/src/ML-PACE/pair_pace_extrapolation.cpp
+++ b/src/ML-PACE/pair_pace_extrapolation.cpp
@@ -123,8 +123,6 @@ void PairPACEExtrapolation::compute(int eflag, int vflag) {
     double delx, dely, delz, evdwl;
     double fij[3];
     int *ilist, *jlist, *numneigh, **firstneigh;
-    double max_gamma_grade = 0;
-    max_gamma_grade_per_structure = 0;
     ev_init(eflag, vflag);
 
     // downwards modified by YL
@@ -213,9 +211,7 @@ void PairPACEExtrapolation::compute(int eflag, int vflag) {
         // 'compute_atom' will update the `ace->e_atom` and `ace->neighbours_forces(jj, alpha)` arrays and max_gamma_grade
 
         if (flag_compute_extrapolation_grade) {
-            double current_atom_gamma_grade = aceimpl->ace->max_gamma_grade;
-            if (max_gamma_grade < current_atom_gamma_grade) max_gamma_grade = current_atom_gamma_grade;
-            extrapolation_grade_gamma[i] = current_atom_gamma_grade;
+            extrapolation_grade_gamma[i] =  aceimpl->ace->max_gamma_grade;;
         }
 
         Array2D<DOUBLE_TYPE> &neighbours_forces =
@@ -264,25 +260,6 @@ void PairPACEExtrapolation::compute(int eflag, int vflag) {
 
     if (vflag_fdotr) virial_fdotr_compute();
 
-//    if (flag_compute_extrapolation_grade) {
-//        //gather together max_gamma_grade_per_structure
-//        MPI_Allreduce(&max_gamma_grade, &max_gamma_grade_per_structure, 1, MPI_DOUBLE, MPI_MAX, world);
-//
-//        // TODO: check, whether to stop here or externally in LAMMPS
-//        // check if gamma_upper_bound is exceeded
-//        if (max_gamma_grade_per_structure > gamma_upper_bound) {
-//            if (comm->me == 0)
-//                error->all(FLERR,
-//                           "Extrapolation grade is too large (gamma={:.3f} > gamma_upper_bound={:.3f}, "
-//                           "timestep={}), stopping...\n",
-//                           max_gamma_grade_per_structure, gamma_upper_bound, current_timestep);
-//
-//            MPI_Barrier(world);
-//            MPI_Abort(world, 1);    //abort properly with error code '1' if not using many processes
-//            exit(EXIT_FAILURE);
-//        }
-//    }
-
     // end modifications YL
 }
 
@@ -303,41 +280,13 @@ void PairPACEExtrapolation::allocate() {
 ------------------------------------------------------------------------- */
 
 void PairPACEExtrapolation::settings(int narg, char **arg) {
-    if (narg > 3) {
-        error->all(FLERR,
-                   "Illegal pair_style command. Correct form:\n\tpair_style pace/al "
-                   "[gamma_lower_bound] [gamma_upper_bound] [freq]");
-    }
-
     if (narg > 0) {
-        double glb = atof(arg[0]);    // gamma lower bound
-        if (glb < 1.0)
-            error->all(FLERR, "Illegal gamma_lower_bound value: it should be real number >= 1.0");
-        else
-            gamma_lower_bound = glb;
+        error->all(FLERR,
+                   "Illegal pair_style command. Correct form:\n\tpair_style pace/extrapolation ");
     }
 
-    if (narg > 1) {
-        double gub = atof(arg[1]);    // gamma upper bound
-        if (gub < gamma_lower_bound)
-            error->all(
-                    FLERR,
-                    "Illegal gamma_upper_bound value: it should be real number >= gamma_lower_bound >= 1.0");
-        else
-            gamma_upper_bound = gub;
-    }
-
-//    if (narg > 2) {
-//        gamma_grade_eval_freq = atoi(arg[2]);
-//        if (gamma_grade_eval_freq < 1)
-//            error->all(FLERR, "Illegal gamma_grade_eval_freq value: it should be integer number >= 1");
-//    }
-
     if (comm->me == 0) {
         utils::logmesg(lmp, "ACE/AL version: {}.{}.{}\n", VERSION_YEAR, VERSION_MONTH, VERSION_DAY);
-        utils::logmesg(lmp, "Extrapolation grade thresholds (lower/upper): {}/{}\n", gamma_lower_bound,
-                       gamma_upper_bound);
-//        utils::logmesg(lmp, "Extrapolation grade evaluation frequency: {}\n", gamma_grade_eval_freq);
     }
 }
 
diff --git a/src/ML-PACE/pair_pace_extrapolation.h b/src/ML-PACE/pair_pace_extrapolation.h
index 3cacf1dc27..6e4eb53965 100644
--- a/src/ML-PACE/pair_pace_extrapolation.h
+++ b/src/ML-PACE/pair_pace_extrapolation.h
@@ -47,17 +47,10 @@ class PairPACEExtrapolation : public Pair {
 
  protected:
   struct ACEALImpl *aceimpl;
-//  bigint gamma_grade_eval_freq = 1;
-//  bool is_set_energies_forces = true;    // if set, then update forces and energies
   int nmax;
 
-  double gamma_lower_bound = 1.5;
-  double gamma_upper_bound = 10;
-  double max_gamma_grade_per_structure = 0;
-
   void allocate();
   std::vector<std::string> element_names;    // list of elements (used by dump pace/extrapolation)
-  double rcutmax;                            // max cutoff for all elements
   int nelements;                             // # of unique elements
   double *extrapolation_grade_gamma;         //per-atom gamma value
 
diff --git a/src/fix_pair.cpp b/src/fix_pair.cpp
index 36d6372876..93e76f0c74 100644
--- a/src/fix_pair.cpp
+++ b/src/fix_pair.cpp
@@ -279,3 +279,11 @@ double FixPair::memory_usage()
   else bytes += (double)atom->nmax*ncols * sizeof(double);
   return bytes;
 }
+
+int FixPair::modify_param(int narg, char **arg)
+{
+    nevery = utils::inumeric(FLERR,arg[0],false,lmp);
+    if (nevery < 1) error->all(FLERR,"Illegal fix_modify pair command");
+
+    return 1; // how many arguments were processed
+}
\ No newline at end of file
diff --git a/src/fix_pair.h b/src/fix_pair.h
index a9927cf477..7686adff66 100644
--- a/src/fix_pair.h
+++ b/src/fix_pair.h
@@ -38,6 +38,8 @@ class FixPair : public Fix {
   void grow_arrays(int) override;
   double memory_usage() override;
 
+  int modify_param(int, char **) override;
+
  private:
   int nevery,nfield,ncols;
   char *pairname;