The trailer/commercial peaks at -8dB LKFS (ITU-R BS.1770-1) but says nothing of standards.
There actually is a standard for trailers, but unfortunately some theaters don't enforce or self-comply the content they take in to those standards. Much less what they should be doing... rejecting anything that doesn't meet the standard (money talks, right?), like the MPAA does with their trailers.
TASA