diff --git a/src/yang/etsi-nfv-common.yang b/src/yang/etsi-nfv-common.yang
index aaf829e5306799314008129488fba83de485515d..e5a678168719705b863954a2a7589ffceb627277 100644
--- a/src/yang/etsi-nfv-common.yang
+++ b/src/yang/etsi-nfv-common.yang
@@ -387,8 +387,8 @@ submodule etsi-nfv-common {
 
   grouping local-affinity-or-anti-affinity-rule {
     list local-affinity-or-anti-affinity-rule {
-      key "affinity-type affinity-scope";
-      leaf affinity-type {
+      key "type scope";
+      leaf type {
         type affinity-type;
         description
           "Specifies whether the rule is an affinity rule or an
@@ -398,7 +398,7 @@ submodule etsi-nfv-common {
            LocalAffinityOrAntiAffinityRule information element.";
       }
 
-      leaf affinity-scope {
+      leaf scope {
         type affinity-scope;
         description
           "Specifies the scope of the rule, possible values are
diff --git a/src/yang/etsi-nfv-ns.yang b/src/yang/etsi-nfv-ns.yang
index 5f80ffe5d5dfe17f92b0136df0368e18b2c8efe8..4053e919c9d4ae480c059e1687b767867648815b 100644
--- a/src/yang/etsi-nfv-ns.yang
+++ b/src/yang/etsi-nfv-ns.yang
@@ -418,6 +418,8 @@ submodule etsi-nfv-ns {
       list nfp-position-element {
         key "id";
 
+	min-elements 1;
+
         leaf id {
           type string;
           description
@@ -564,6 +566,8 @@ submodule etsi-nfv-ns {
         list position-desc {
           key "id";
 
+	  min-elements 1;
+
           leaf id {
             type string;
             description
@@ -578,12 +582,10 @@ submodule etsi-nfv-ns {
               path "../../../nfp-position-element/id";
             }
             description
-              "References NfpPositionElement associated with one of the
-               constituent VNF Profile, PNF Profile or NS Profile of a
-               nested NS.";
+              "Reference to one or a pair of CPDs or SAPDs.";
             reference
-              "GS NFV IFA014: Section 6.4.2.2 Vnffgd information
-               element";
+              "GS NFV IFA014: Section 6.4.5.2 NfpPositionDesc
+               information element";
           }
 
           leaf forwarding-behaviour {
@@ -637,6 +639,7 @@ submodule etsi-nfv-ns {
     leaf-list autoscale-rule {
       type string;
     }
+
     list lifecycle-management-script {
       key "event";
       leaf event {
@@ -1278,6 +1281,71 @@ submodule etsi-nfv-ns {
           "GS NFV IFA014: Section 6.3.2.2 NsDf information element";
       }
 
+      container ns-lcm-additional-params {
+        container instantiate {
+          list params {
+            key "key";
+
+            leaf key {
+              type string;
+            }
+
+            leaf value {
+              type string;
+            }
+	    description
+              "Array of KVP requirements for additional parameters
+               of NS to be passed when invoking the Instantiate Ns
+               operation.";
+            reference
+              "GS NFV IFA014: Section 6.2.10.3
+               InstantiateNsAdditionalParams information element";
+          }
+        }
+
+        container scale {
+          list params {
+            key "key";
+
+            leaf key {
+              type string;
+            }
+
+            leaf value {
+              type string;
+            }
+	    description
+              "Array of KVP requirements for additional parameters
+               of NS to be passed when invoking the Scale Ns
+               operation.";
+            reference
+              "GS NFV IFA014: Section 6.2.10.4
+               ScaleNsAdditionalParams information element";
+          }
+        }
+
+        container heal {
+          list params {
+            key "key";
+
+            leaf key {
+              type string;
+            }
+
+            leaf value {
+              type string;
+            }
+	    description
+              "Array of KVP requirements for additional parameters
+               of NS to be passed when invoking the Heal Ns
+               operation.";
+            reference
+              "GS NFV IFA014: Section 6.2.10.5
+               HealNsAdditionalParams information element";
+          }
+        }
+      }
+
       list ns-profile {
         must "min-number-of-instances <= max-number-of-instances" {
           error-message
diff --git a/src/yang/etsi-nfv-pnf.yang b/src/yang/etsi-nfv-pnf.yang
index ffe5d064004831f8c62fe68b97f6811f745dfd2a..ac49f29500cad1a5c1dc19cb4dc3eadec313a6fe 100644
--- a/src/yang/etsi-nfv-pnf.yang
+++ b/src/yang/etsi-nfv-pnf.yang
@@ -92,18 +92,6 @@ submodule etsi-nfv-pnf {
         "GS NFV-IFA014: Section 6.6.2, Pnfd information element";
     }
 
-    list security {
-      key "signature";
-      uses security-parameters;
-      description
-        "Provides a signature to prevent tampering.
-         Editor's Note: While IFA014 does specify that the PNFD
-         includes a security parameter. SOL001 does not have one.
-         We need to harmonize SOL001 & SOL006 on this point.";
-      reference
-        "GS NFV-IFA014: Section 6.6.2, Pnfd information element";
-    }
-
     leaf geographical-location-info {
       type string;
       description