Age waiver question - 18 year old

[jg_nuy]

Hello:
Another couple of additional questions from my son (18) about TESU. 

1. He is signed up for 3 TECEPS - these will count as RA credits once he passes them?
   
2. He is wrapping up his XAMK courses, which will come in somewhere between 30-40 US credits. These credits are RA and mostly free electives. Will these RA supersede ACE credits that are currently slotted as free electives? He wants to make sure he is meeting the 30 RA credit requirement without issue.