Collection in which the syndicate of co-owners records the improvements made to a private portion. As part of the development of this register, the syndicate is required to establish a description of the private portions that is sufficiently specific to ensure that the improvements made by the co-owners are identifiable. The same description may apply to several private portions when they present the same characteristics. This document is part of the register of co-ownership and must be made available to any co-owner who requests it.