TRENT972
Keep reading your referenced selection. 2b is a rough reiteration of the Authority the FAA exerts on compliance issues. It is essentially a "Heads Up" to the applicant.
It is a statement for clarification, and as such leaves purposeful and narrow openings for latitude in following the process. If you know dogs: Not a "Collar", per se, but a "choke chain".
Advisory? Absolutely. Also a SUPERVISORY. The FAA hasn't the equipment or the talent the manufacturer does, so the FAA allows the Company to do all the research and development. Also, of course, the manufacturing of components.
If you know flying: "Pull Up, Terrain".
TRENT Cleared by whom?