Voting traditionally lasts for, at most, fifteen minutes, but it may be extended if the leadership needs to "whip" more members into alignment.[1] The 2003 vote on the prescription drug benefit was open for three hours, from 3:00 to 6:00 a.m., to receive four additional votes, three of which were necessary to pass the legislation.[58] The 2005 vote on the Central American Free Trade Agreement was open for one hour, from 11:00 p.m. to midnight.[59] An October 2005 vote on facilitating refinery construction was kept open for forty minutes.[60]