— comments: According to the clause 4.6.2 of the Code on Distribution Systems in the case of standard and non-standard “turnkey” hook-up, the development of design and appraisal documentation for the electrical installation of external power supply is carried out by the DSO (and includes an input device with a switching device).Meanwhile, the technical specifications contain requirements for engineering maintenance in the customer's networks and, accordingly, the design and construction thereof shall be ensured by the Customer; the terms of reference (technical task) contain the requirements for engineering maintenance in the DSO networks and, accordingly, their design and construction shall be carried out by the DSO.