ID Registration and Roster Management is now available on NPPA's website.
From the NPPL's last email:
"Players can now register online through the National Professional Paintball Association NPPA. Memberships will be $40.00 for the entire year. This year's membership will also include 4 star events.
Players that register and pay before March 10th will receive a free HB event T- shirt with team names on back."