Given the circumstances mentioned in GP's comment, it appears they are living in a condo, and the HOA is constructed to cover the rules for the use and maintena

Given the circumstances mentioned in GP's comment, it appears they are living in a condo, and the HOA is constructed to cover the rules for the use and maintenance of jointly-owned portions of the building. This isn't a case of "HOA is mad that next door neighbor used a wrong species of grass for their lawn."