Add ValidationRule::allows_modification()

src/pcd.rs

@@ -310,6 +310,10 @@ impl ValidationRule {
         Ok(res)
     }
 
+    pub fn allows_modification(&self) -> bool {
+        self.quorum > 0.0 && self.min_sig_member > 0.0
+    }
+
     pub fn is_satisfied(
         &self,
         field: &str,