This is the oath of fealty that has been used since before the guerilla wars:


We will never bring disgrace upon this our Guild
by an act of dishonesty or cowardice
or betratyal of information or fellow Guild members.
We will fight for the ideals and sacred things
of the Guild, both alone and with many.
We will revere and obey the Guild's laws, and
will do our best to incite a like reverence and
respect in those above us who are prone to 
annul them or set them at naught.
We will strive increasingly to quicken the
public sense of the betterment of the Guild.
Thus in all these ways we will transmit this
Guild, not only less, but greater and more
beautiful than it was transmitted to us.

Note that you will be held to this oath if you take it, and if you back out of
your word, the result will be much more than a KOS, but a ruin made of your name.