Military tickets for kids?

[twodogs]

We are planning to take my nieces with us to DLR for their first trip. Their father is fully retired military, and they both have active military IDs. We are not military ourselves, but my Dad is fully retired military, so when we travel with them, we have used and are familiar with the Salute tickets. On this trip, only my nieces will have IDs. I am not clear if their Dad can purchase Salute tickets for them on base, for them to use on the trip? I know that normally the military member or spouse needs to purchase the tickets and also be using one of the Salute tickets, but I didn’t know if there were any exceptions if the military member or spouse was not on the trip? Probably just going to need to purchase regular tickets for them as I don’t feel like this is allowed by Disney?