Standard VII: CFA Responsibilities. Members and Candidates must not engage in any conduct that compromises the reputation or integrity of CFA Institute or the CFA designation, or the integrity, validity or security of the CFA examinations. This Standard specifically addresses the integrity or validity of the CFA examination process.
Incidental means secondary in time or importance. If you lose weight because you moved and must walk further to school, the weight loss was incidental to the move. When something is incidental, it is never the main thing. It's okay to include incidental details as they can add depth to your storytelling, but they are never crucial to the story.
Incidentally is a word you use when you've got more to say on a topic or want to transition into a new subject. Think of the word incidentally as a more formal way to say by the way.. Incidentally can also mean by chance if you want to remark on a coincidence. Sometimes, things just happen by chance, like you and your friend showing up at the same place incidentally. Incidentally, the word ends in lly so don't forget to throw that extra l in there!