[CQ-Contest] what PX can I use?

[kr2q at optonline.net]

Seems to me that this is answered in the rules.  Note the LAST sentence below.  

If I cannot sign KR2Q/100 (which the FCC allows but apparently the WPX rules do not), 
it would seem to be obvious (logical?) that you cannot sign "/NV4" either.

Personally, I think WPX has more than enough PX's to go around and seems like nearly every
other QSO (or maybe even 8 out of 10) are PX mults anyway.  It sure would be fun to 
let everybody pick their px.  Many guys use a "funny" px call anyway, and not their own call.

de Doug KR2Q

(a) A PREFIX is the letter/numeral combination which forms the first part of the amateur call.
Examples: N8, W8, WD8, HG1, HG19, KC2, OE2, OE25, etc. Any difference in the numbering, 
lettering, or order of same shall constitute a separate prefix. A station operating from a DXCC 
country different from that indicated by its callsign is required to sign portable. The portable 
prefix must be an authorized prefix of the country/call area of operation. In cases of portable 
operation, the portable designator will then become the prefix. Example: N8BJQ operating from 
Wake Island would sign N8BJQ/KH9 or N8BJQ/NH9. KH6XXX operating from Ohio must use an 
authorized prefix for the U.S. 8th district (W8, K8, etc.). Portable designators without numbers 
will be assigned a zero (Ø) after the second letter of the portable designator to form the prefix. 
Example: PA/N8BJQ would become PAØ. All calls without numbers will be assigned a zero (Ø) 
after the first two letters to form the prefix. Example: XEFTJW would count as XEØ. Maritime 
mobile, mobile, /A, /E, /J, /P, or interim license class identifiers do not count as prefixes. You may not make up your own prefix.