Zone eighteen was S-classified.
S-Rank classification was the standard requirement for zone eighteen access. The rank scale ran F, E, D, C, B, A, S, SS, SSS—seven tiers above B, each one representing a threshold of output that the previous tier could not reach. S-Rank hunters were rare. Fewer than one percent of registered Guild hunters held B-Rank. S-Rank was rarer still. Zone eighteen's classification reflected that rarity: the creatures there required S-Rank output to engage safely, and the zone's ambient density would suppress anything below S-Rank operating capacity within its perimeter.
Kai's Sovereign-Class standing order covered unrestricted zone access. The Zone Desk had issued that order under the oversight board's authority and it did not specify zone tier limits.
He filed the permit at the morning hour.
