In an attempt to avoid a potential headache at the end of the regular season, the commissioners of the six BCS football conferences have voted to expand the pool of BCS at-large candidates from 14 to 18. The new rule goes into effect only if there aren't enough teams among the top 14 of the final BCS standings to fill 10 slots in the BCS National Championship Game, Orange Bowl, Sugar Bowl, Fiesta Bowl and Rose Bowl. The new rule was approved by commissioners for the 2007 season and will be announced by the BCS on Tuesday.