You and your Manager are misconstruing the point of the AC. The point is not to suggest development of another "runway". This AC change is simply addressing operations in an unprepared area WITHIN the safety area of an existing runway. Essentially, these areas may require zero "preparation" and minimal maintenance. Here in Bozeman, pilots often land adjacent to runway 3/21. You are truly on your own there, though, since the airport does zero maintenance there, other than mowing alongside the runway, which they do for all runways. But, nobody "prepared" the area for grass operations, nobody monitors it, and there is NO "designated" landing area. You land wherever you like, as long as it's adjacent that runway.
This area is in fact kind of rough, unless you're running big tires, and there are some culverts out there. There is NO prep, only mowing, and the point is, as the admonition of the Tower suggests, landing there is at your own risk. Don't expect a "runway", cause there isn't one there.
And, in fact, BZN has a very nice turf runway. So, why do some folks land "off airport" within the airport? To significantly reduce taxi distance, which can be harder on Bushwheels than landing.
What your Manager is talking about is DEVELOPING a dedicated grass/unpaved runway, which is an entirely different subject, and has nothing to do with this AC. Someone should point this out to him.
MTV