* 1/3 OF ALL OF OWNERS AND SHARES
-Installation of telecommunications infrastructure or adapting of existing ones.
-Installing common or private systems of renewable energy.
-Installing energy-supply infrastructure groups.
*MAJORITY OF ALL OWNERS AND SHARES (50% +1)
-Works or service establishment in order to abolish architectural barriers where the amount exceeds twelve months of community fees and, in any case, the establishment of the lift. Once the agreement is made, all owners will be obliged to pay the related expenses even if these exceed the amount of the twelve monthly installments.
* 3/5 OF ALL OWNERS AND SHARES
-Establishment or abolition of concierge services, concierge, security and other common services of general interest. The lease of common elements that are not assigned to a specific use in the building.
-The establishment or removal of equipments and systems that are designed to improve energy or water efficiency of the property (other than collective systems for the use of solar energy or other collective energy supplies).
-The material division, aggregation, new plant construction, substantial alterations (enclosure and surround).
-Improvement Works.
* UNANIMOUSLY
For those agreements which are not expressly regulated in art. 17 involving the adoption or amendment of the rules contained in Title or statutes.
* SIMPLE MAJORITY
For the rest of the agreements.
VOTES OF ABSENT OWNERS
Except in those cases where you cannot pass on the cost of a service to those owners who did not vote in favor of the agreement at the meeting or in cases in which the modification or utilization is of individual use, general rule is that the owners not attending the meeting who do not express their disagreement to the resolution adopted within 30 days of notification of the agreement, will have their vote counted as in favor of the adopted resolution.