diff --git a/org/qmckl_local_energy.org b/org/qmckl_local_energy.org
index fbee7ae..a2314f1 100644
--- a/org/qmckl_local_energy.org
+++ b/org/qmckl_local_energy.org
@@ -177,6 +177,42 @@ typedef struct qmckl_local_energy_struct {
    Some values are initialized by default, and are not concerned by
    this mechanism.
 
+** Access functions
+
+   When all the data for the local energy have been provided, the following
+   function returns ~true~.
+
+   #+begin_src c :comments org :tangle (eval h_func)
+bool      qmckl_local_energy_provided           (const qmckl_context context);
+   #+end_src
+
+      #+begin_src c :comments org :tangle (eval c) :noweb yes :exports none
+bool qmckl_local_energy_provided(const qmckl_context context) {
+
+  if (qmckl_context_check(context) == QMCKL_NULL_CONTEXT) {
+    return false;
+  }
+
+  qmckl_context_struct* const ctx = (qmckl_context_struct*) context;
+  assert (ctx != NULL);
+
+  qmckl_exit_code rc;
+
+  if(!qmckl_electron_provided(context)) return QMCKL_NOT_PROVIDED;
+
+  if(!qmckl_nucleus_provided(context)) return QMCKL_NOT_PROVIDED;
+
+  rc = qmckl_provide_ao_basis_ao_vgl(context);
+  if (rc != QMCKL_SUCCESS) return rc;
+
+  rc = qmckl_provide_mo_basis_mo_vgl(context);
+  if (rc != QMCKL_SUCCESS) return rc;
+
+  ctx->local_energy.provided = (ctx->local_energy.uninitialized == 0);
+  return ctx->local_energy.provided;
+}
+      #+end_src
+
 * Computation
 ** Kinetic energy
    :PROPERTIES: