Rangel and Waters have both demanded their hearings begin as soon as possible.
Rangel was charged in July with 13 ethics violations regarding his taxes, disclosure forms, his use of Congressional letterhead to raise money for an educational center in his honor and his use of four rent-controlled apartments in Harlem.
Waters was charged in August with three violations related to help she gave to a California bank her husband held stock in.
A spokesman for Rangel was not immediately available for comment. A spokesman for Waters said the congresswoman is drafting a statement.