Pricing/photo Question

Guys,

Bonehead newbie question of the day.....

Asked a few days ago on the forum where I noticed but no answer.

Noticed in some photos of the DOGS OUT PARTIES, girls wearing a white tag with:

"P100 REG ONLY"

What does this mean,pricing code,BF code?? Or is it relating strictly to the contest.

Also, has anyone ever BF from one of these contests, (is it possible) or can it only be done in their home club?

Thanks for your time!