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- International Gas Union, IGU
- Ministry of Energy
- State Energy and Water Regulatory Commission
- Bulgarian Energy Holding
- Balkan and Black Sea Petroleum Association
- Bulgarian Association Natural Gas (BANG)
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- Chief Directorate Fire Safety and Civil Protection - Ministry of Interior
- European Clean Hydrogen Alliance
- Chief Directorate Fire Safety and Civil Protection - Ministry of Interior
- University of mining and geology "St. Ivan Rilski"