Can condo board change common areas without a majority vote of unit owners?

Q: Our bylaws were amended to allow the board to approve material alterations to the common areas that cost $10,000 or less by a majority vote of the board. The amendment was properly adopted by the unit owners. Is this a lawful amendment? Seems as though the board could authorize a number of “material alterations” that cost under $10,000.00   Read the article………………