diff --git a/installers/install_osm.sh b/installers/install_osm.sh
index 476115e..5ea7116 100755
--- a/installers/install_osm.sh
+++ b/installers/install_osm.sh
@@ -29,6 +29,13 @@
     echo -e "     -u <repo base>: use specified repository url for osm packages"
     echo -e "     -k <repo key>:  use specified repository public key url"
     echo -e "     -a <apt proxy url>: use this apt proxy url when downloading apt packages (air-gapped installation)"
+    echo -e "     -c <kubernetes engine>: use a specific kubernetes engine (options: kubeadm, k3s), default is kubeadm"
+    echo -e "     -t <docker tag> specify osm docker tag (default is latest)"
+    echo -e "     -M <KUBECONFIG_FILE>: Kubeconfig of an existing cluster to be used as mgmt cluster instead of OSM cluster"
+    echo -e "     -G <KUBECONFIG_FILE>: Kubeconfig of an existing cluster to be used as auxiliary cluster instead of OSM cluster"
+    echo -e "     --no-mgmt-cluster: Do not provision a mgmt cluster for cloud-native gitops operations in OSM (NEW in Release SIXTEEN) (by default, it is installed)"
+    echo -e "     --no-aux-cluster: Do not provision an auxiliary cluster for cloud-native gitops operations in OSM (NEW in Release SIXTEEN) (by default, it is installed)"
+    echo -e "     -D <devops path>:   use local devops installation path"
     echo -e "     -s <namespace>  namespace when installed using k8s, default is osm"
     echo -e "     -H <VCA host>   use specific juju host controller IP"
     echo -e "     -S <VCA secret> use VCA/juju secret key"
@@ -38,13 +45,11 @@
     echo -e "     --old-sa:       install old Service Assurance framework (MON, POL); do not install Airflow and Pushgateway"
     echo -e "     --ng-sa:        install new Service Assurance framework (Airflow, AlertManager and Pushgateway) (enabled by default)"
     echo -e "     -o <COMPONENT>: ONLY installs the specified component (k8s_monitor, ng-sa, k8scluster, docker, deploy-osm)"
-    echo -e "     -O <openrc file path/cloud name>: Install OSM to an OpenStack infrastructure. <openrc file/cloud name> is required. If a <cloud name> is used, the clouds.yaml file should be under ~/.config/openstack/ or /etc/openstack/"
-    echo -e "     -N <openstack public network name/ID>: Public network name required to setup OSM to OpenStack"
-    echo -e "     -f <path to SSH public key>: Public SSH key to use to deploy OSM to OpenStack"
-    echo -e "     -F <path to cloud-init file>: Cloud-Init userdata file to deploy OSM to OpenStack"
-    echo -e "     -D <devops path> use local devops installation path"
-    echo -e "     -w <work dir>   Location to store runtime installation"
-    echo -e "     -t <docker tag> specify osm docker tag (default is latest)"
+    echo -e "     -O <openrc file path/cloud name>: install OSM to an OpenStack infrastructure. <openrc file/cloud name> is required. If a <cloud name> is used, the clouds.yaml file should be under ~/.config/openstack/ or /etc/openstack/"
+    echo -e "     -N <openstack public network name/ID>: public network name required to setup OSM to OpenStack"
+    echo -e "     -f <path to SSH public key>: public SSH key to use to deploy OSM to OpenStack"
+    echo -e "     -F <path to cloud-init file>: cloud-init userdata file to deploy OSM to OpenStack"
+    echo -e "     -w <work dir>:   Location to store runtime installation"
     echo -e "     -l:             LXD cloud yaml file"
     echo -e "     -L:             LXD credentials yaml file"
     echo -e "     -K:             Specifies the name of the controller to use - The controller must be already bootstrapped"
@@ -130,7 +135,8 @@
     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 }
 
-while getopts ":a:b:r:n:k:u:R:D:o:O:m:N:H:S:s:t:U:P:A:l:L:K:d:p:T:f:F:-: hy" o; do
+while getopts ":a:c:r:n:k:u:R:D:o:O:N:H:S:s:t:U:P:A:l:L:K:d:p:T:f:F:G:M:-: hy" o; do
+
     case "${o}" in
         D)
             DEVOPS_PATH="${OPTARG}"