If a POG, awarded with a CAB (combat action badge), were to transfer to Infantry, would the soldier be authorized to wear the CIB?

NO. Not awarded CIB.

NO...… A Big NO.... Have we tarnished the Combat Infantry Badge enough.... In Vietnam you needed 30 days in combat, not you need but a few hours.... Why not put them in Cracker Jacks boxes...?

I read what each had to say about the CIB or CAB, I am sure there is a regulation alone with orders
to wear any badge if he or she service in the Army. If he or she cross over to the Air Force that is a horse of another color..when I see a officer or General displaying all his or her medals and badges
I wonder how, when and where he or she get them. I think if you was awarded the badge you can wear it..be aware someone will question about your badge....

Yes... You said a Combat action badge, not a Combat infantry badge. Obviously you need to be in combat and in the infantry to get the CiB, but you earned your combat action badge which is different. POG or not..

PFC, you have a lot to learn about the military if you think anyone "not infantry" is a POG. I was a 19D Cav Scout for 23 years, served as a combat advisor in Afghanistan and saw my fair share of combat was awarded a CAB for those actions. I never once considered myself a POG and neither did the infantry soldiers I served with.

In answer to your question, no, they would not be authorized to wear a CIB.

First, why are you so worried about what others wear or will wear? Obviously he’s not one of your soldiers so I safely assume the leadership knows what awards he’s entitled to and is wearing.
Third, you can have your opinion of that soldier as a POG and but best to keep it to yourself and keep yourself squared away.
And fourth, why ask such a stupid question......if it’s that important to you then search the regulations yourself to get the answer. That’s what a smart service Krier would do. But then again, is the pit calling the kettle black if you get my drift.

In the Corps we joke around about Pog's too but all bullshit aside.... Our Drill Instructors at Perris Island and San Diego, and our Marine Combat Training Instructors, drilled into us that EVERY MARINE: Pilot, Cook, Avionics Tech, Tanker, Admin, Journalist, Raider, Truck Driver, etc.. etc... etc... is a Rifleman 1st. For the entire branch of service is calibrated to exists and support that 0311 Rifleman busting down that door on the ground...Any Marine Male or Female is trained, fit, ready and able to put aside any specialized vocation they do, pick up a rifle, and integrate immediately into combat patrol duty...This is why there are no special combat action badges and awards in the Corps (The EGA placed in our hand in boot camp was our special award)...Just the plain and modest C.A.R...denotes that a Marine has been down range...and even that was not considered a big deal...at least mine never was...A Purple Heart or Silver Star perhaps, Navy Cross CMH Definately.... but not a feakin CAR??!!

No.

I bet that you can answer this yourself.

Per regulations, both the CAB and the CIB are Tier 1 awards. And with the requirements of each, if you change your M.O.S., as the question suggests, you are not authorized to change your award. SGT(P) Duncan is correct to a certain degree, and wrong as well. To earn the CIB, you must be an Infantry soldier, or SF, and assigned an Infantry position during combat. If you come under fire that falls within the guidelines of the CIB to be awarded to you, then you may wear the CIB. If you are an Infantry soldier, but not assigned to an Infantry position and come under fire, you are awarded the CAB. I speak from experience on this one.
My first tour in Iraq, '04 to '05, I was in an Infantry unit, doing an Infantry job, and came under fire almost daily. Therefore I was awarded the CIB. On my third tour to Iraq, I was a Team Leader for a Personal Security Detail during '09 to '10. We came under fire, and because I was not assigned an Infantry position, I was awarded the CAB. Because they are both Tier 1 awards, I am only authorized to wear either the CIB or the CAB. I cannot wear both at the same time. Needless to say, I chose to wear the CIB on my uniform.