Allegations of the complainant. (76) The complainant has argued that AS Oslo Sporveier’s negative tax position has been used to reduce the tax burden on AS Sporveisbussene. According to the complainant, favourable tax conditions in the Oslo Sporveier Group could possibly have been used to avoid payment of tax on profits made in a market wholly or partially exposed to competition. The basis for this complaint seems to be that AS Sporveisbussene in the period 2000-2004, while having a profit before tax of approximately NOK 54 796 000, only had a taxable income of NOK 2 027 000.