Is a ten print card and photo required for each Form 1 or Form 4 filed by a trust, or only the first application with a given set of trustees?
Every submission for prints & photos. Trust docs - provided they don't change - don't need to be resent within 2 years of an approval.
Silencer Shop's kiosks will be the exception to the photos/prints rule, as ATF granted them a variance to re-use that information once it's collected through their kiosks. At some point, they will open the kiosks to transactions other than suppressor purchases too.