D.C. Mun. Regs. tit. 30, § 907
907.1 The Agency shall pay in prizes at least fifty percent (50%) of each week's POWERBALL® sales from all tickets and shall allocate that amount to the winning pool or pools for payment of prizes for that game.
907.2 The prize money allocated to the Grand Prize category shall be awarded equally to the number of game boards winning a Grand Prize.
907.3 If in any game drawing there are no plays which qualify for the prize, the prize money for that game drawing shall be added to the prize pool.
907.4 Any amount remaining in the prize pool at the end of this game shall be carried forward to a replacement game or expended in a manner as directed by the Executive Director in accordance with District law.
907.5 When the Grand Prize reaches the annuitized amount guaranteed by the Agency, two percent (2%) of sales, including tax, shall be placed in trust in one (1) or more prize reserve accounts until the prize reserve accounts reach the amounts designated by the Executive Director in accordance with all agreements governing the conduct of the POWERBALL® game. Once the prize reserve accounts exceed the designated amounts, the excess shall become part of the prize pool. Any amount remaining in a prize reserve account at the end of this game shall be carried forward to a replacement game prize reserve account or expended in a manner as directed by the Executive Director in accordance with all agreements governing the conduct of the POWERBALL® game.
907.6 When the Grand Prize reaches a new high level ("Record Level") and there are one (1) or more prizewinners at that Record Level, the excess over the amount needed to fund the advertised prize shall fund a pool which will be divided equally among Match 5 winners as a bonus prize ("Bonus Prize").
SOURCE: Final Rulemaking published at 39 DCR 7439, 7459 (October 2, 1992); as amended by Final Rulemaking published at 40 DCR 6959, 6962 (October 1, 1993); and by Final Rulemaking published at 42 DCR 3817 (July 21, 1995) and 50 DCR 1526 (February 14, 2003).