1097. Decisions concerning the following matters are made by co-owners representing three-quarters of the votes of the co-owners present or represented:(1) acts of acquisition or alienation of immovables by the syndicate;
(2) work for the alteration, enlargement or improvement of the common portions, the apportionment of the cost of the work and the granting of a movable hypothec to finance it;
(3) the construction of buildings to create new fractions;
(4) the amendment of the act constituting the co-ownership or of the description of the fractions;
(5) the amendment of the description of the private portions referred to in section 1070.