The CLMP now has an "ethics" statement
NOTE: FOETRY NO LONGER ENDORSES TUPELO PRESS GUIDELINES NOR ANY OF EDITOR, JEFFREY LEVINE’S BUSINESS ENDEAVORS. (updated 1/20/2010)
Tupelo Press (which I have recommended for strong contest guidelines in the past) says they endorse the CLMP Contest Code of Ethics:
CLMP Contest Code of Ethics
CLMP’s community of independent literary publishers believes that ethical contests serve our shared […]