I submitted my .shp file as requested; why is the Commission asking for more map files?
A shapefile is not a single file, but a collection of seven files – .dbf, .prj, .sbn, .sbx, .shx, .shp, .xml. Without all of these, the data cannot be read. If you are working in ArcGIS, all of these files should be generated automatically. If you are working in another mapping program, not all of them may be automatically generated upon export. However, if you have assigned the correct coordinate system, projection, and spatial extent to your data, it may be readable anyway.