In Max is it necessary to put the RPN Null 7FH/7FH after each data byte?

I am presuming if my ctlouts are in the correct order right to left, Max would complete the three bytes before starting another process with a different RPN / NRPN CC numbers / values, avoiding data bytes "overtaking" other RPN / NRPN messages. Is this correct?

I'm deciding between these two aproaches at the moment:

I wouldn't want automation or a MIDI hardware's controller's messing it up... Would the Nulls actually be essential in Live for Automation (Although I couldn't have multiple CC6's on the same channel continuously automated at the same time). Maybe I should stick to CC10 for Pan etc, although the 303 isn't General MIDI I could do this for those that do fit the spec, for the sake of overlapping automation on the same channel... so the example for Pan above would just be CC10 anyway.

However that doesn't help the others that are only RPN / NRPN only.

Running Status in MIDI RPN / NRPN