TRUE or FALSE. The option to create loopback and reflexive NAT rules is only available when adding a NEW NAT rule, not when editing an existing NAT rule

TRUE. The option to create loopback and reflexive NAT rules is typically available only when adding a new NAT rule, and not during the editing of an existing NAT rule. However, specifics can vary depending on the firewall or router being used, so it's always a good idea to refer to the documentation for the particular device in question.