This link will take you to a paper i wrote a few years ago on Judging Tasmanian Railway Parcel Stamps at FIP exhibitions it was published in NAPE. I think it now needs an update but will give you a guide to exhibiting in this area.
Dave
http://www.ozrevenues.com/Judging-Papers/tas_rails.htm
Judging Tasmanian Railway Parcel Stamps at FIP level
Judging Tasmanian Railway Parcel Stamps at FIP level
Please visit my oz revenues web site: http://www.ozrevenues.com and don't forget "Illegitimi non carborundum"