1. Railway Supplier Authorisation AF Series, No. 7398, valid until 19.09.2022
2. Railway Technical Approval AT Series, No. 158/2018 “Construction works, assembly and capital repairs to the ELF power supply electrical installations in the field of railway and underground transport”, valid until 13.03.2022
3. Railway Technical Approval AT Series, no. 284/2018 “Construction works, assembly and overhaul of power supply installations (EA) for electrified railways 25 kV – 50 Hz”
4. Railway Technical Approval AT Series, No. 281/2018 “Design of transmission and distribution lines for electricity, substations and substations 0.4 110 kV”
5. Railway Technical Approval AT Series, No. 505/2018 “Sub-crossings of railway lines, by horizontal drilling, for diameters less than or equal to 400mm”, in the field of railway transport