The AWS Ops policy terraforming-aws/modules/ops_manager/templates/iam_policy.json is fine for PAS but for PKS you need elasticloadbalancing:DeregisterInstancesFromLoadBalancer, elasticloadbalancing:RegisterInstancesWithLoadBalancer also in the template.
The AWS Ops policy terraforming-aws/modules/ops_manager/templates/iam_policy.json is fine for PAS but for PKS you need elasticloadbalancing:DeregisterInstancesFromLoadBalancer, elasticloadbalancing:RegisterInstancesWithLoadBalancer also in the template.