Dear Rene,
- The Turkish legal sources of the topic you have questioned was generally regulated in the "Attorneyship Act" (numbered as 1136, entered intp force as of 07/04/1969; broadly amended by the law numbered 4667, entered into force as of 02.05.2001) and specifically laid down in the "Regulation on the prohibition of the publicity regulations of the Union of the Bar Associations of Turkey" and the "Professional Rules" .


You may find the English translations of these documents in the site below:
http://www.barobirlik.org.tr/mevzuat...yship_law.aspx