Hey Moreeyes,
I have been fishing the league on the boater side for 3 years and fished a couple years as a co-angler on the tour.
In the 1 day events you are allowed to share any info you have. If you are prefishing on your own or with some one not in the tournament you can share any and all info with your boater for the day.
I would say if you prefish with another boater you might want to keep that info to yourself even though there are no rules about it but it would be a courtesy to the boater you prefished with. You can ask the boater, there might be some info he/she won’t care if you share.
The information sharing rules are in place for multi day tournaments…..you absolutely can NOT share info from day 1 with your day 2 boater, even if it is your info, if you prefish and you tell your day 1 boater what you have for info you are not supposed to share that with your day 2 and beyond boaters.
Best bet is to put yourself in the boaters shoes….if you wouldn’t want someone sharing info with a competing boater the best bet is to keep it to yourself.