42. The members of a regional council referred to in the first paragraph of section 40 shall elect from among their number a chairman for the period they determine.
The chairman of the regional council shall preside over the sittings of the council and assume the other functions assigned to him by the council.
Where the chairman is absent or unable to act, the members of the council referred to in the first paragraph of section 40 shall designate from among their number one member to replace him for the period they determine.