Group III (EN) GROUPS AND CATEGORIES OF CONSTRUCTIONS FOR WHICH “EKOSTROY” LTD. IS REGISTERED IN THE CENTRAL PROFESSIONAL REGISTER OF BUILDERS AT THE BULGARIAN CONSTRUCTION CHAMBER: Group I Group II Group III Group IV Group V Third Group of Constructions Construction of the energy infrastructure, according to Art. 5, para. 1, point 3 of the PIRICPPC 3.3. Constructions from third to fifth category according to Art. 5, para. 4 of the PIRICPPC.