This technical report of type 3 is intended to offer useful information to design a distribution automation system (DAS) using distribution line carrier (DLC) systems for a specific application. For the sake of clarity, the information, useful to design a DAS using DLC systems for a specific application, has been subdivided into three main steps: - the first step concerns the strategic choices determining the architecture of the DAS (clause 3); - the second step deals with the specification of the application processes and the related operational parameters (clause 4); - the third step refers to the facilities that both processing and transmission equipment have to provide in order to cope with the application needs (clause 5). Clause 6 is dedicated to a general valuation of different coupling methods. Clause 7 is instead dedicated to the quality assurance procedures in order to meet the application needs included in a DLC system. Moreover, this technical report contains two annexes: - annex A containing the comparison and evaluation of two different modulation techniques (narrow-band FSK modulation and wide-band modulation); - annex B containing the general outline of a quality plan.