- I-st group: for constructions from third to fifth categories of high-rise construction, its related infrastructure, electronic communication networks and facilities
- II-nd group: for constructions of the transport infrastructure; constructions from third and fourth category
- III-rd group for constructions from third to fifth category of the energy infrastructure
- IV-th group: for constructions from third to fifth categories of public works infrastructure, hydrotechnical construction and environmental protection
- V-th group for for individual types of construction and assembly works according to the National Classification of Economic Activities – from 45.11 to 45.50 – all types.