Being ch a ra cte ristic plant form ation of M e d iterran ia n region M aquis lands, besides of their antierosional and hydrologic functions, eing potential afforestration areas and including rich genetic resources are very im p o rtan t for countries landing on sem i-arid climatical zone. In spite of this reality, m aquis lands had been the subject of densely criticisms andd ifferent legal regulations. Those regulations cacused diffrent applications of com m issions of forest cad astre and ju risp ru d e n tia l conflicts betvveen departm ents of T urkish Suprem e C ourt (Y argıtay). T his.subject begun to dispute again vvith a nevv decision vvhich has given by t he G reat Council of Jurisp ru d en ce C onjunction of Turkish Suprem e C ourt. In this study after exam ining m aquis concept and it's relation vvith sim ilar form ations, som e inform ations given about m aqui application andt ried evaluation of above m entioned decision of Y argıtay.