The Commission, when (i) written application made to it by the board of directors or by the stockholders representing two-fifths of the total outstanding capital stock of any bank incorporated under the laws of, and doing business in, the Commonwealth or (ii) in the judgment of the Commission it may be necessary for the protection of the public or of persons depositing or dealing with such bank, shall make or cause to be made a special examination of the bank. All expenses incident to such special examination may be charged to the bank so examined and shall be paid by the bank so charged.