Excuse me for jumping in. This isn't the high sector at UPT. Part 121 has to report RAs, period. It's in their FOMs. Heavies probably all have it too if you dig enough- either 97 or HATR. Keep it in the container. TAC Airlifter, your answer is yes. IFR, whether VMC or IMC (Do not confuse the rules and the flight vis. conditions)You WILL be following the RA, period. Normally, the climb or descent is gentle. A big violation in terms of climb, descent and speed (400 TAS min, right in this case? plus lots of VVI) will drive the TCAS nuts and the RA may seem to need enough pull or push to hurt someone in the airliner (SHOULD not really happen).
If VMC and VFR, YMMV. Remember, ATC suppresses the mode 1200s, you have to ask about them sometimes- like getting a coastal visual into Patrick or similar.
Fly safe, have fun when you can. I'm on mil leave from part 121 cargo, the one of the big 2 about to furlough... wthdik.
I'm no Tim Martins...