SELECT
  A.TravelRate,
  A.DateChanged AS TravelRateDateChanged
FROM
  taUsersTravelRates AS A
WHERE
  (A.UserID = @aUserID) AND
  (A.TravelRateID = (

    SELECT MAX(N.TravelRateID)
    FROM taUsersTravelRates AS N
    WHERE
      (N.UserID = A.UserID) AND
      (N.DateChanged = (

        SELECT MAX(O.DateChanged)
        FROM taUsersTravelRates AS O
        WHERE (O.UserID = A.UserID)

      ))
  ))
