At least more than 50%. The signature of the maintenance fund requires the consent of more than a certain proportion of the owners to take effect. This ratio will be determined according to relevant laws and regulations or the resolution of the owners' meeting. According to laws and regulations, the signature of the maintenance fund requires the consent of more than 50% of the owners. This means that the use and expenditure of the maintenance fund must be approved by more than half of the owners. Some areas even require a higher proportion, such as more than two-thirds of the owners agree. This regulation aims to ensure that the use of maintenance funds is widely supported and recognized, protect the rights and interests of owners, and prevent the opinions of a few people from having too much impact on the whole property.