Where the cooperative governing documents are silent, a material alteration or substantial addition to the common areas would require what vote of the membership?

If the cooperative's governing documents do not specify a procedure, the law generally requires a supermajority (usually two-thirds or 66.6%) vote of the membership for material alterations or substantial additions to the common areas. These changes impact the rights of members and are hence subject to approval.

Explanation:

In many jurisdictions, when a cooperative's governing documents do not specify a procedure for material alterations or substantial additions to the common areas, a supermajority vote of the membership is typically required. This often amounts to at least two-thirds (66.6%) of the membership, although it varies depending on the local laws.

A material alteration refers to any palpable change or amendment that, once complete, does not maintain the original appearance of the area. A substantial addition is an extension or increase to the original area, which changes the structure. Both of these actions usually affect the rights and privileges of members, hence needing a vote.

In cooperative housing, these changes are significant because the common areas are collectively owned by all members. The vote makes sure that every member's opinion is considered before making such alterations or additions.

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