Notes: Point 125 of Cabinet Regulation No.149 sets a rule that  if it is determined that the average specific radioactivity of radon in a building is more than 200 Bq/m3 per year, the owner of the building or apartment shall inform the tenant and the RSC (if the level of radon has been determined by an accredited laboratory). The RSC shall inform the population of the expected damage to their health and jointly with the owner or tenant of the building or apartment decide regarding the taking of protection measures for reduction of the harmful effect of radon. Also Point 126 of Cabinet Regulation No.149 includes a measure that if it is determined that the average specific radioactivity of radon in a building is more than 1000 Bq/m3 at the moment the measurement is made or 600 Bq/m3 on average per year, the owner or tenant of the building or apartment shall immediately take protection measures.  