Over time, most REAs change when circumstances change and components change ownership. In many cases, therefore, the REA will effectively consist of a series of REAs and separate amendments and ancillary agreements that can become quite complicated. The basic rule is that the changes made during this process are important because they reveal changes in the circumstances and potential problems that arise in the REA. Sometimes the REA is modified and completely overhauled, which is often preferable at some point. One of the most common housing applications of mutual relief occurs when two units share access, for example. B in a duplex. Reciprocal relief allows each side of the duplex to move anywhere on the driveway and prevents both sides from building a fence in the middle of the driveway. Reciprocal facilities are also useful for maintaining access to open spaces and common roads. The main advantage of mutual relief is that it allows the use of space more efficiently. Instead of requiring access, amenities and surrounding functions from each property, reciprocal facilities allow them to share these functions, allowing for greater density and fluidity between lands.
On the other hand, a mutual facilitation agreement also asks how to allocate costs in the areas of ease and to preserve the areas covered by the facilities. When this analysis is carried out, the lender and its advisor will begin with an agenda similar to that resulting from the revision of a heavily negotiated lease. However, the process is complicated by the fact that all parties to the REA – and there could be many – want to negotiate the REA to make it work flawlessly and without problems. To the extent that the developer creates the REA before one of these parts is entered into the image, the developer will generally try to get the same result, but the document will probably be simpler. However, the developer can enter into separate agreements with some of the owners when they purchase their components. These separate agreements may add complexity, but the mortgage lender will only see such an agreement regarding its own borrower. On the other hand, leases tend to be more general and (in most cases) more biased towards a given party, often the lessor (the borrower). Because REA is an agreement that defines the rights and obligations of different owners, some IFDs may be longer and more complex, depending on the number of stakeholders involved and the specific needs of the owners.