Thoroughbred trainers Karl M. Broberg and Steven Miyadi will be denied all privileges of The American Stud Book for a period of one year effective January 1, 2013, the Jockey Club announced Dec. 27.

This includes the privilege of registering foals born in 2013, in addition to the denial of privileges of any registration process for any Thoroughbred during this time.

According to a release, both individuals violated applicable racing authority statutes, rules or regulations relating to horses on three or more occasions in a 365-day period involving prohibited or restricted drugs, medications, or substances. The denial of privileges is pursuant to Rule 19 in the principal rules and requirements of The American Stud Book.

Horses under Broberg’s supervision were found to be in violation of medication rules three times at Remington Park, in Oklahoma City, Okla., in 2011 and once at Oaklawn Park, in Hot Springs, Ark., in 2012. This year he saddled 939 starters with 218 wins through Dec. 27