In order that the banks fulfil an important economic function than the other joint stock companies, they are subject to different regulations and various interventions of the public power. Banking Regulation and Supervision Board permission relating to the the acquisition and transfer of bank shares that result in acquisition or assignment of shares which represent stated percent or qualified is one of these public interventions. According to the Article 18 of Banking Law, acquisition of shares that result in the acquisition by one person of shares representing ten percent or more of the capital of a bank, shares held by one shareholder exceed ten percent, twenty percent, thirty-three percent or fifty percent of capital, assignments of shares that result in shares held by one shareholder falling below these percentages, assignment and transfer of prefential shares with the right of promoting a member to the board of directors or audit committee or issue of new shares with privilege, acquisition of voting rights and establishment of unusfructory rights on shares, transactions to be performed in case the shares of banks whose shares are exchanged on the market are purchased from the stock exchange, the transfer of shares of legal persons who own capital of a bank are sıbjected to the Board permission.