I've never been asked for a Schedule 1 attachment.
FYI, if the body of your trust mentions any schedule where property is located, as in "See schedule 1 (mine is schedule A), or B or C (mine and my wife's separate property placed in trust) for list of owned assets, etc." you must submit those schedules with the trust. Your trust may not be constructed this way, but my trust lists several schedules and when I didn't submit all schedules mentioned, I received a "NO GO" at that station. Cost me about two weeks on my Form 1 in 2010. YMMV.