Here is more detail about PBP: For
PBP 2027, the dates for completing brevets that will go toward
your registration priority will be for ACP sanctioned events
that start from Nov 1, 2025 through Oct 31, 2026.
For PBP 2027, the dates for completing ACP sanctioned
brevets that count toward qualification will be those ACP
events that start from Nov 1, 2026 through some point in the
summer of 2027. That end date does not yet appear to have been
published, but assume it will be somewhere around July 1,
2027.
Expressed another way, "So ... RUSA ACP events up to and
including Oct 31, 2026, will determine registration priority.
Rides on Nov 1, 2026 and forward will be qualifying events."