Pursuant to Article 116 of the Energy Law

1.2.
 
TRANSMISSION
 
SYSTEM
 
AND
 
THE
 
SCOPE
 
OF
 
APPLICATION
 
OF
 
THE
 
CODE 
1.2.1. Transmission system operator, in addition to transmission system, also manages a part 
of distributive system, which, as a rule, includes: 110 kV bus coupler bays, 110 kV line bays 
and 110 kV busbars, in accordance with the Categorization of the power system elements 
referred to in points 1.2.2-1.2.4.
1.2.2. 400 kV, 220 kV and 110 kV power system elements are normally classified depending 
on the voltage level of the facility and the element impact on the reliability of the 
transmission system and interconnection, according to the following general criteria of 
categorization into: 
- the first group: the power system elements of 400 kV and 220 kV voltage level 
and 110 kV interconnection lines, with the associated bays; 
- the second group: the power system elements of 110 kV that are important for 
reliable operation of power generation facilities and 110 kV interconnection 
lines; 

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- the third group: 110 kV power system elements that do not fall under the criteria 
for the first and second group, which are managed by JSC EMS; 
- the fourth group: the power system elements that are not managed by JSC EMS. 
More detailed criteria of Categorisation are determined by JSC EMS. 
1.2.3. JSC EMS does not create document Categorization of elements 400 kV, 220 kV and
110 kV (hereinafter referred to as: the Categorization), which shall contain a list of all 
overhead transmission lines, transformer stations and switchyards, with full title, numbering 
and categorization of elements of the transmission facilities and the transmission system 
users’ facilities of 400 kV, 220 kV and 110 kV. 
1.2.4. Apart form the very transmission system, the scope of application of the Code covers 
also the power system elements of 400 kV, 220 kV and 110 kV, classified under 
Categorization into the first, second or third group of the power system elements.