The major aspects of the theme or subject are developed and presented using philatelic material. Every philatelic piece presented is essential to the theme or subject being developed. It can be enhanced by use of the widest possible variety of philatelic elements consistent with the theme or subject.
Commercial usage is preferred where it exists.
The write-up is the minimum essential to conveying relevance of philatelic material and answering questions the material, itself, raises. The material goes beyond that which is most easily available for the theme or subject, and is balanced. The philatelic material stands out. Exhibit encourages the viewer's attention. The optimum emphasis on a First Day Cover exhibit should be primarily First Day Covers and associated First Day material.