The governing body of each county included in a regional housing authority shall appoint one person as a commissioner of such authority, and each such commissioner to be first appointed by the governing body of a county may be appointed at or after the time of the adoption of the resolution declaring the need for such regional housing authority or declaring the need for the inclusion of such county in the area of operation of such regional housing authority. When the area of operation of a regional housing authority is increased to include an additional county or counties as provided in this article, the governing body of each such county shall thereupon appoint one additional person as a commissioner of the regional housing authority. The governing body of each county shall appoint the successor of the commissioner appointed by it. If any county is excluded from the area of operation of a regional housing authority, the office of the commissioner of such regional housing authority appointed by the governing body of such county shall be thereupon abolished. If the area of operation of a regional housing authority consists at any time of an even number of counties, the commissioners of the regional housing authority appointed by the governing bodies of such counties shall appoint one additional commissioner whose term of office shall be as provided in this section for a commissioner of a regional housing authority, except that such term shall end at any earlier time that the area of operation of the regional housing authority shall be changed to consist of an odd number of counties. The commissioners of such authority appointed by the governing bodies of such counties shall likewise appoint each person to succeed such additional commissioner; provided, that the term of office of such person begins during the terms of office of the commissioners appointing him. A certificate of the appointment of any commissioner of a regional housing authority shall be signed by the appointing officer or officers and filed with the other records of the regional housing authority and shall be conclusive evidence of the due and proper appointment of such commissioner. The commissioners of a regional housing authority shall be appointed for terms of five years, except that all vacancies shall be filled for the unexpired terms. Each commissioner shall hold office until his successor has been appointed and has qualified, except as otherwise provided in this section. For inefficiency or neglect of duty or misconduct in office, a commissioner of a regional housing authority may be removed by the officer or officers, or their successors, appointing such commissioner, but he shall be removed only after he has been given a copy of the charges at least 10 days prior to the hearing thereon and has had an opportunity to be heard in person or by counsel. In the event of the removal of such commissioner, a record of the proceedings, together with the charges and findings thereon, shall be filed with the other records of the regional housing authority. The commissioners shall constitute the regional housing authority, and the powers of such authority shall be vested in such commissioners in office from time to time. The commissioners of a regional housing authority shall elect a chairman from among the commissioners and shall have power to select or employ such other officers and employees as the regional housing authority may require. A majority of the commissioners of a regional housing authority shall constitute a quorum of such authority for the purpose of conducting its business and exercising its powers and for all other purposes.