“We are collectively working on behalf of everyone in the sport — grooms, hot walkers, jockeys, exercise riders, starters, trainers, owners, track managers and every horse wearing a bridle and a saddle — to reform and improve racing every day,” said the Stronach Group, the track’s owner; the Thoroughbred Owners of California; and California Thoroughbred Trainers. “After extensive consultation among all partners, Santa Anita Park will stay open through the end of its meet to see these reforms through.”

The Stronach Group did not immediately respond to a request for comment on Tuesday evening.

The board is a regulatory agency and does not have the power to suspend horse racing without approval of the designated track. It does have the power to take such action if it goes through a 10-day notification period.

In March, after the 22nd horse death this season, the track said it would ban the use of drugs and whips on racing days.

Track officials have not publicly pinpointed the cause of the deaths, but drugs and whips are among the factors under examination. Track conditions and colder and rainier weather than usual have also been under inspection.

The park, a thoroughbred racetrack in Arcadia, Calif., is among the grandest venues in horse racing. But the recent spate of deaths and injuries has put pressure on the Stronach Group and the sport at large to enact meaningful measures to ensure safety of its equine athletes and the jockeys who ride them.