Group IV (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 Fourth Group of Constructions Construction of public infrastructure, hydro-technical construction and environmental protection, according to Art. 5, para. 1, item 4 of the PIRICPPC 4.2. Constructions from the second to the fifth category according to art. 5, para. 4 of the PIRICPPC.