Kentucky Derby-winning trainer Doug O’Neill has been suspended 45 days as a result of one of his horses exceeding the allowable limit for total carbon dioxide. But the punishment won’t begin before July 1, ensuring he will be able to saddle I’ll Have Another in next month’s Belmont Stakes.

The suspension comes in the midst of I’ll Have Another’s bid to become horse racing’s first Triple Crown winner in 34 years. The colt won the Derby and Preakness last Saturday.