For my 120 semester hour lifetime limit, does it all have to be for one degree?

No, it is up to the Sailor on how to best use their 120 semester hours.  While TA/NCPACE funding is still restricted to one degree at each level, credits can be used across multiple degrees.  It is highly recommended to contact the NCVEC at 833-330-6622, select option 3, then option 1 to develop a long term educational plan to maximize your credits.

NOTE: This article is in reference to NAVADMIN 114/19.