An exception is made to the rule in the first paragraph of article L. 2121-17 :
1° When, convened a second time to deliberate on the same subject, the number of councillors present is not, this time again, more than half. The second summons or communication of the items on the agenda expressly reiterates this provision;
2° When the Town Council is prevented from validly deliberating by the fact that half or more of the Town Councillors are personally interested or as proxies in the matters being discussed or decided.