Pursuant to Article 116 of the Energy Law

3.3.2.2. Transmission system development  
3.3.2.2.1. For the preparation of the Transmission System Development Plan it is necessary to 
obtain a harmonised set of input data. In case of a significant deviation between the different 
data sources, an explanation shall be provided for the adopted set of data. 
3.3.2.2.2. The first step in developing Transmission System Development Plan is the analysis 
of the current state of the transmission grid (age of facilities, unavailability of certain 
elements of the transmission grid, observed congestion and recorded transmission events) as 
well as security analyses for the present state of the transmission grid. The second step is the 
analysis of transmission grid including all facilities whose construction is in process based on 
the previous development plans, taking into account the years when they were put in 
operation. Based on these analyses, different variants of alternative solutions are made for the 
construction of new transmission facilities, reconstruction and expansion of the existing 
transmission grid elements. The process is repeated until the end of the planning period, 
taking into account proposed solutions for each variant. 
3.3.2.2.3. For each variant, costs of depreciation, maintenance and loss are assessed, and then, 
all variants are compared for economic effectiveness and optimal variant is evaluated for the 
transmission grid development. 

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3.3.2.2.4. New interconnection lines are planned on the basis of systematic studies and 
feasibility studies, which examine broader impact of the planned lines, considering that the 
decision to construct these elements of the transmission grid is based on the consent of the 
neighbouring transmission system operators. 
3.3.2.2.5. Definition of the final Transmission System Development Plan by years includes a 
plan for construction of new transmission facilities, reconstruction of existing transmission 
facilities and construction of new interconnection lines, with the necessary budget for 
investments by years.
3.3.2.2.6. The Transmission System Development Plan includes, as information of special 
importance, data on places of possible congestions in the transmission grid (the list of 
transmission elements deemed to be exposed to frequent overloads). 
3.3.2.2.7. If it is determined that the associated equipment related to transmission lines or 
transformers in the transmission grid can become a constraint in the ground state or after a 
single outage of the transmission grid elements, JSC EMS shall enter in the Transmission 
System Development Plan the data about equipment in the transmission and distribution 
facilities, which constrain the flow of power through the transmission grid and which has to 
be timely replaced.