For inefficiency, neglect of duty, or misconduct in office, a commissioner may be removed by the governing body of the county in the case of a county authority, or by the mayor, if he has the power of appointment of commissioners, otherwise, by the governing body of the city in the case of a city authority. A commissioner shall be removed only after he has been given a copy of the charges at least 10 days prior to the hearing on them and has had an opportunity to be heard in person or by counsel. If a commissioner is removed, a record of the proceedings and the charges and findings on them shall be filed in the office of the clerk.