In the second step so-called areas of intervention are then determined, i.e. a set of white BSUs (for more see chapter 6.4) into which public aid may be directed. The mapping results, similarly to the determination of the areas of intervention, will be subject to collective or, if necessary, individualised public consultations. When calculating the colour of each BSU, the ratio of address points in which at least one available electronic communications connection is indicated to all the address points in the BSU is thus primarily calculated. If the ratio is less than 50%, the BSU is assessed as white. If the ratio is 50% and over, the number of enterprises that indicated a non-zero number of available electronic communications connections in the given BSU is investigated. If there is a single such enterprise, the BSU is assessed as grey, in other cases as black. In this connection it is important to emphasise that in the case of the coverage of a single address point by more than one enterprise, this address point was only included in the calculation once. Mapping is a dynamic process and therefore for the purposes of this document, and mainly for the economic analysis, the data submitted by the Czech Telecommunication Office to the Ministry of Industry and Trade on 31 May 2016 and fixed as of 25 May 2016 is used as the base, in which out of the total number of 22 439 BSUs, 6 642 are white, or 29.60%. 2 611 BSUs, or 11.64% of the total number, are grey, and the remaining 13 186 BSUs are black, which is 58.76% of the total number of BSUs. In this connection it is essential to take into account that when averaging the coverage of the 6 642 white BSUs it was found that at the current time the average coverage percentage hovers around 7% and when taking into account business plans around 20%, which is significantly less than the selected threshold of 50%. The public consultation on the data collection was opened for comments in the period from 28 July 2016 to 30 September 201632. 32 An on-line application for this public consultation is available at www.verejnakonzultace.cz. 20