The aim of the article was answer the main research question if ex ante regulation using LRIC (“Long run incremental costs”) model is appropriate for Access relevant markets regulation on economic small markets, especially in time of NGN (next generation networks). LRIC model is the strongest regulation which can be imposed by regulators in some EU country. European Commission defined two relevant Access markets susceptible to “ex ante” regulation. The new recommendation of the European Commission (EC 2007) on relevant markets defined Market 4 (previously Market 11) as the market for wholesale (physical) network infrastructure Access (also local loop unbundling) at fixed location and market 5 as Broadband Access (include only bit stream Access).