A DMA is usually a tailor-made contract, it is necessary from the outset to obtain professional advice and expertise to ensure that the DMA effectively regulates the relations between the parties, minimizes the risk and improves the efficiency and quality of the resulting development. The authority that the owner grants to the developer must also be taken into consideration. It is customary for the owner to retain an element of control with respect to the management of a development, by requiring the developer to seek consent or approval with respect to important decisions, processes, purchase options, or when the services provided result in a financial threshold being exceeded. When an owner attempts to develop their land or land and appoint a developer who does so on their behalf, the parties usually enter into a Development Management Agreement (DMA).