joint owners shall jointly share the payments of expenses incurred as a result of providing common services as well as equipments, appliances having for common utilizations and the expenses incurred as s result of the looking after, maintenance and operations of common property in accordance with the ratio of the freehold in common property under section 14, by each joint owner or in accordance with the portion of the adventage upon the provided, however, that this shall be in accordance with the requirements set forth under the regulations