The competition takes place in the unexplored area between '94nop and LP settings which has recently been investigated by Fizmo in Redcode Talk.
The exact settings are as follows:
The pMARS command line is
pmars -p 200 -l 20 -r 1000.
LDPare forbidden, up to two entries are allowed and battles will take part in a round-robin tournament.
For more information, take a look at the announcement in rec.games.corewar.