The deadline to enroll a 2017 in-utero foal as a Breeding Entry for $400 is December 31, 2016 (postmarked/electronic transaction dated). Late enrollments will be accepted postmarked/electronic transaction dated January 1 through February 15th the year the foal is due with an additional $100 late fee. Nominations postmarked/electronic transaction dated after February 15 will not be accepted.
Every fourth Breeding Entry enrolled in the same year by the same owner may be enrolled at one half price. The discount applies to each submission of at least four entries submitted at the same time. Forms can be found online.
-- via AHA