The current Work-In-Progress of the Policy is available at:
http://svn.cacert.org/CAcert/policy.htm
The deprecated CPS can be found at https://www.cacert.org/cps.php. This one is being rewritten as above for audit.
The CPS is CAcert Official Document COD6. An overview on all CODs can be found at OfficialDocument.
CPSs of other CAs
For your inspiration see some CPSs of other CAs:
Non profit CAs
CPS of EuroPKI a "no-profit organization established to create and develop a pan-european public-key infrastructure".