The Interstate Commerce Commission has rejected the appeal of its former secretary and congressional liaison officer, Robert Oswald, to stall his dismissal.

In a registered letter sent out late yesterday to Oswald's attorneys, the ICC noted that it has given Oswald two extensions on the time he had to file his appeal after the commission announced its intention to fire him in early December.

Oswald has been invovled in Justice Department and ICC investigations into alleged influence-peddling at the commission for more than six months. Although the Justice Department probe is continuing, the ICC investigation concluded in December that, at the least, he had violated the commission code of conduct. At that time, he was dismissed.

According to spokesman Douglas Baldwin, the commission said in its letter yesterday that any one of the five charges leveled against Oswald by the ICC would have justified firing him.

Although the Federal Privacy Act, prohibits the commission from releasing the charges, Oswald's attorneys released them to the Washington Post last week.

He was charged with attempting to get a potential witness to lie to a grand jury about a meeting Oswald had with Thomas Gambino, son of mob figure Carlo Gambino, concerning legal representation before the ICC for for the younger Gambino and his trucking firm.