**NOTE: Effective August 1, 2018 the qualifications for the BN3D and N3D will require three horse trials at the same 3D level to be competed, or higher, meeting the MER’s, plus one additional MER with no more than 20 jump penalties. Two of which must be completed as a combination (same) horse and rider.

MER (minimum eligibility requirement:
Dressage – no more than 50 penalty points;
Cross-country – no jumping penalties and not more than 36-time penalties;
Show Jumping – no more than 16 jump penalties.

2018 USEF Rules for Eventing – Subchapter EV-4EV – EV155 Three-Day Events (see also Appendix 8)
Reprinted with permission of the U.S. Equestrian Federation

NATIONAL THREE-DAY EVENTS (P3D and T3D).  These competitions are conducted in accordance with the USEF Rules for Eventing and the additions and exceptions noted below.

TRAINING THREE-DAY EVENT (T3D) – Open to competitors of any age, on horses four years of age or older. Both the competitor and the horse, must have obtained MER’s at Four Horse Trials at the Training Level or higher. One of which must be attained as a combination.  A competitor established at the Preliminary Level may compete on a horse which has obtained 2 MER’s at the Training Level or higher.

PRELIMINARY THREE-DAY EVENT (P3D)– Open to competitors beginning the calendar year of their 14th birthday, on horses five years of age or older. Both the competitor and the horse, though not necessarily as a combination, must have obtained an MER at three Horse Trials at the Preliminary Level or higher, plus an additional MER at the Preliminary Level or higher with no more than 20 Jumping Penalties at obstacles on the Cross-country test.

PARTICIPATION FOR ALL LEVELS
A. Riders must be members of the USEA (Junior, Full, Intercollegiate Life).
B. Horses must be USEA registered: Limited (BN,N & T ) and Full (P).
C. USEA Fees (Drug/Meds/Admin/Starter) shall be paid at the time of entry.

QUALIFYING TIME FRAME FOR BEGINNER NOVICE AND NOVICE LEVELS ONLY
A
. Qualifying competitions for all levels must be completed within a 24-month period of the first horse inspection of the selected classic event.
B. A horse may be entered in a three-day event without having fulfilled the qualifications. An organizer, at their discretion, and as space allows, may allow entries to fulfill the necessary qualifications after the closing date.
QUALIFYING TIME FRAME FOR TRAINING AND PRELIMINARY LEVELS
EV106 Entries – 2. Entry Forms.
Entries must be received by the end of the day on the closing date. Qualifications must be fulfilled at least 10 days before the cross-country test of the competition for which it is needed if the MER has been achieved at a horse trial.