A method, apparatus, and computer program for authenticating a newly activated local area base station in a cellular network is presented. According to this technique, the dummy patterns can be placed up to the area near the boundary BL between the element forming region DA and dummy region FA by placing the first dummy pattern DP1 of relatively wider area and the second dummy pattern DP2 of relatively small area in the dummy region FA. In one embodiment, the end of the tab may be accessed by a pointed tool to allow the block to be removed. The paving machine futher include a control device that positions the at least two screed elements relative to the frame assembly.