Central Hospital Districts (CHD) in Finland provide most of the Assistive Technology Device Services (ATDS). ATDSs have been developing their work and unifying their practices regionally. Each of these 20 CHDs have their own guidelines for the ground rules for lending assistive technology devices. These ground rules include principles of ATD Services and lending rules for different device groups classified by ISO 9999 standard. There has been a growing pressure to unify the practices of ATDS nationally, because of a growing need for devices and economy. A project to unify National Guidelines was set up in spring 2016. There were four different review rounds among CHD ATD services and patient organizations. The Ground Rules will be published in 2017.