Merc Guild

What are the main provisions made by the Mercenaries Guild?

I'll suggest:
The Mercenary Guild acts as a sort of mutual insurance company for
merc units.  A unit posts funds as a bond with the Guild and agrees to
abide by the code of conduct.  In return, the Guild pays, if needed,
for ransom (based on the higher of claimed or functional rank),
repatriation, or burial.

   The Guild does not investigate transgressions (eg killing
prisoners) by units not under bond at the time, but will post
allegations and their source.
   It does investigate violations by a unit under bond at the time, if
the opposing side (or anyone else) pays for travel and expenses (which
are so minor in comparison to the expenses of fighting a war that this
is almost never an issue).  If a unit is found to have violated the
Mercenary's Code, the bond is forfeited.  There is no other penalty
and the unit may post another bond then or later if it wishes (and may
lose it again, too).

  In addition, the Guild may act as arbitrator in contract disputes,
clearinghouse for new contracts, etc.

Suggestions, additions, amplifications?