diff --git a/nodeup/pkg/model/kubelet.go b/nodeup/pkg/model/kubelet.go
index 7db2f6b9e0..8016f2a237 100644
--- a/nodeup/pkg/model/kubelet.go
+++ b/nodeup/pkg/model/kubelet.go
@@ -690,8 +690,7 @@ func (b *KubeletBuilder) kubeletNames() ([]string, error) {
 		return nil, fmt.Errorf("error describing instances: %v", err)
 	}
 
-	useInstanceIDForNodeName := b.Cluster.Spec.ExternalCloudControllerManager != nil && b.IsKubernetesGTE("1.23")
-	return awsup.GetInstanceCertificateNames(result, useInstanceIDForNodeName)
+	return awsup.GetInstanceCertificateNames(result, b.NodeupConfig.UseInstanceIDForNodeName)
 }
 
 func (b *KubeletBuilder) buildCgroupService(name string) *nodetasks.Service {
diff --git a/nodeup/pkg/model/ntp.go b/nodeup/pkg/model/ntp.go
index fbab6fc354..f2beef677b 100644
--- a/nodeup/pkg/model/ntp.go
+++ b/nodeup/pkg/model/ntp.go
@@ -35,7 +35,7 @@ var _ fi.NodeupModelBuilder = &NTPBuilder{}
 
 // Build is responsible for configuring NTP
 func (b *NTPBuilder) Build(c *fi.NodeupModelBuilderContext) error {
-	if !b.managed() {
+	if b.NodeupModelContext.NodeupConfig.NTPUnmanaged {
 		klog.Infof("Managed is set to false; won't install NTP")
 		return nil
 	}
@@ -116,11 +116,3 @@ NTP=` + host + `
 		Mode:     s("0644"),
 	}
 }
-
-// managed determines if kops should manage the installation and configuration of NTP.
-func (b *NTPBuilder) managed() bool {
-	n := b.Cluster.Spec.NTP
-	// Consider the NTP is managed when the NTP configuration
-	// is not specified (for backward compatibility).
-	return n == nil || n.Managed == nil || *n.Managed
-}
diff --git a/pkg/apis/nodeup/config.go b/pkg/apis/nodeup/config.go
index 610b84b331..a8d6f021c2 100644
--- a/pkg/apis/nodeup/config.go
+++ b/pkg/apis/nodeup/config.go
@@ -61,6 +61,8 @@ type Config struct {
 	KubeletConfig kops.KubeletConfigSpec
 	// KubeProxy defines the kube-proxy configuration.
 	KubeProxy *kops.KubeProxyConfig
+	// NTPUnmanaged is true when NTP is not managed by kOps.
+	NTPUnmanaged bool `json:",omitempty"`
 	// SysctlParameters will configure kernel parameters using sysctl(8). When
 	// specified, each parameter must follow the form variable=value, the way
 	// it would appear in sysctl.conf.
@@ -198,6 +200,10 @@ func NewConfig(cluster *kops.Cluster, instanceGroup *kops.InstanceGroup) (*Confi
 
 	config.KubeProxy = buildKubeProxy(cluster, instanceGroup)
 
+	if cluster.Spec.NTP != nil && cluster.Spec.NTP.Managed != nil && !*cluster.Spec.NTP.Managed {
+		config.NTPUnmanaged = true
+	}
+
 	if cluster.Spec.CloudProvider.AWS != nil {
 		aws := cluster.Spec.CloudProvider.AWS
 		warmPool := aws.WarmPool.ResolveDefaults(instanceGroup)