3-18,
What kind of aircraft do you fly now?

If it has ACARS and two VHF capable radios like almost every transport category aircraft I've flown at three airlines, then you can monitor guard.

Even when I was on a non-ACARS 727 we were able to comply with the requirement to have a link to dispatch via SELCAL and still monitor guard. If you're trying to find a legal loophole, I think that's going to difficult considering the comm capabilities of most modern 121 aircraft.

Obviously you're going to do what you want. You clearly were unaware of this requirement and ignorance was bliss. Now you've been properly informed. Do with that info as you see fit. The directive is about as clear and unambiguous as could be hoped for from a government agency. Over and out.