NOTE: More time spent is advantageous, since as time progresses, you will hopefully get to know members of the administration well enough that they will come to trust you as a person. This is the most important "requirement" -- trust. Beyond that, a strong knowledge of LPC is helpful, but by no means required. And the time to give a whole -hearted commitment is also pretty important. Any time you feel like you have earned a wizardship here under these guidelines, mail the administration with an application based on this document. This document is subject to change due to changing mud conditions.
This applies to Desolation as well. A good suggestion is to have a detailed, well-thought-out area plan ready, and hopefully a good demonstration of your writing and/or coding skills.
Also, it's a really good idea to play Wasteland if you haven't. =)