| Classification of Products (CZ-CPA_2025) - level 2 - Division | 35 | Electricity, gas, steam and air conditioning supply | 
                
                  
                    | Classification of Products (CZ-CPA_2025) - level 4 - Class | 3511 | Electricity from non-renewable sources | 
                
                  
                    | Classification of Products (CZ-CPA_2025) - level 4 - Class | 3512 | Electricity from renewable sources | 
                
                  
                    | Classification of Products (CZ-CPA_2025) - level 4 - Class | 3513 | Transmission services of electricity | 
                
                  
                    | Classification of Products (CZ-CPA_2025) - level 4 - Class | 3514 | Distribution services of electricity | 
                
                  
                    | Classification of Products (CZ-CPA_2025) - level 4 - Class | 3515 | Trade services of electricity | 
                
                  
                    | Classification of Products (CZ-CPA_2025) - level 4 - Class | 3516 | Storage services of electricity |