Requiring that 0.5% of the funds in the Purse Dedication Account be allocated to the Maryland Horse Industry Fund to be used to fund and award grants to be used for the care, retraining, and promotion of retired racehorses; requiring the Maryland Horse Industry Board to administer the money made available to the Fund; requiring that certain unspent or unencumbered balances in the Fund at the end of the fiscal year revert to the Purse Dedication Account; and providing for the reversion of unused funds.