From the Official ISC Fastpitch website:

The PRAWN rule, as set forth at the Official ISC Website:

(then click PRAWN Rule after arriving at the ISC Rules page, as it defaults to Pitching Rule)

A PRAWN (Player Rep All World Name) list will be maintained by the ISC containing each name of the two all-world teams for the most recent three years, including Most Valuable Player and Most Outstanding Pitcher. The PRAWN list will be released by August 30 each year and posted on the ISC Web site as soon as possible.

For 2011 and beyond, teams will be limited to 5 PRAWN players (combination of one pitcher and position players), plus age related exceptions that may have been named all-World in the last three years – only one of which may be a pitcher. All teams must name their PRAWNs to the Executive Director by June 15 each year.

Current hardship rule will be allowed given the following: the team replacing the player is still required to abide by the PRAWN limits for both players and pitchers. E.g. if the player being replaced is a pitcher with PRAWN status then that team may replace that pitcher with another PRAWN pitcher. No team may add a PRAWN to their roster until their total PRAWN count falls below 5.

AGE EXCEPTION FOR PRAWNs

If a non-PRAWN player makes an All-World team in the calendar year of or after their 45th birthday, that player will only be considered a PRAWN player for one year. PRAWN players who have made or make an All-World team in the calendar year of their 43rd or 44th birthday can request to be excluded from the PRAWN list in the calendar year of their 45th birthday or after one season on the PRAWN list by providing proof of age to the Executive Director by May 15 of each year.

PRAWN Exception

If a non-PRAWN player or players makes an all-World team in the current year, that team will be allowed to carry that player or players until such time that a PRAWN player leaves the team or drops out of the 3-year criterion. If a player makes all-World while with team A and they have 5 current PRAWN players, then team A would be able to carry 6 PRAWNs until one of the 6 leaves the team (or they fall outside the 3-year boundary), then they will only be allowed 5 PRAWNs for the following year. This exception does not apply to the 1-PRAWN pitcher stipulation.

A team may apply for an exception to the one (1) PRAWN pitcher limit provided the second PRAWN pitcher is declared ineligible in all  circumstances to pitch in the ISC World Tournament, including any hardship appeal.

PRAWN Pitchers