Is that actually "legal"? Sorry, I am not experienced in this competition, so quite a bit of questions.
Without the choice of editing, I can only see the laptop being helpful if I want to select which pictures I want to submission.
it is like stealing money elsewhere, and then spend it at the shop, without getting caught. Would you do that?
people who succumb to post editing when it is otherwise mentioned not to, they have no sense of integrity.
if they require you to shoot in jpeg, just shoot in jpeg and submit.