Aptus Non
Aptus Non (also referred to as "Adeptus Non") is a tithe grade used by the Administratum, meaning not applicable.[1]
The Aptus Non tithe grade means that no tithe is required to be paid. Most classes of Aptus Non worlds either provide service to the Imperium in a unique way (such as Adeptus Mechanicus Forge Worlds, Adeptus Astartes Homeworlds[1] or Knight Worlds)[2] or are worlds which would simply not be taxed, such as lifeless dead worlds or worlds unable to produce or provide anything of value.[1]
However, Space Marine Chapters have to give 5% of their gene-seed as a "tithe" for various purposes. It is imperative that the gene-seed be examined for signs of taint or mutation, and if the particular chapter is wiped out, that a portion of their gene-seed remains, ensuring that one day the chapter might be re-founded.[1]
Sources
- 1: Warhammer 40,000 3rd Edition Rulebook, pp. 114–115
- 2: Codex: Imperial Knights (10th Edition), pg. 13 - Feudal Empires
