The Big Book, right up to page 164 (and also beyond) frequently sets out principles and how to apply them. For instance, page 117 talks about not disagreeing in a resentful or critical spirit, page 96 talks about not flogging a dead horse in a sponsorship setting, etc. The contents of the Big Book up to page 164 are the AA programme, and the Twelve Steps as set out on page 59 summarise this programme. The principles themselves are scattered throughout.
A good way to establish whether something is a principle is to ask yourself whether any particular line or instruction contains an idea that could be fruitfully used more broadly in one's life.
A good way to establish whether something is a principle is to ask yourself whether any particular line or instruction contains an idea that could be fruitfully used more broadly in one's life.