Evidence has emerged that high officials at the agency overruled their professional staff and ignored expert advisory committees when they rejected the application.

A top federal medical official overruled the unanimous opinion of his scientific staff when he decided last year to approve a pacemaker-like device to treat persistent depression, a Senate committee reported Thursday.

Senior officials oversaw negotiations, made judgments on arcane questions of contracting procedures and ultimately overruled their own staff's recommendations on whom to select.

Two other officials overruled him.

Arrest warrants made public yesterday said the six officials overruled the advice of the pension plan's actuary and voted to let the city postpone contributions to the fund.

The case was closed after officials at the I.R.S. headquarters in Washington overruled the district office.

Thus these elected officials overruled their own appointees, appointees who were charged specifically with carrying out the rebuilding.

The United Nations then got itself in a muddle, with its military commander in Bosnia calling for NATO air strikes against Serbian positions and its top civilian official here overruling him.

Blair revealed that the desire for match referees to carry out inspections stemmed from recent experiences when local referees had declared pitches playable before the designated official overruled them later.