Can anyone tell me if and where in the CAP check list it states that the lab manager must be proficient in working all areas of the lab?

You could say that it depends on how your job descriptions / organizational chart / quality plan is established.

Is the laboratory manager an administrative position?

Or are they considered a general supervisor/technical consultant designee for testing areas?

Have a look at GEN.53600 & GEN.53625.

Then have a look at CLIA Subpart M §493.1413 (Standard; Technical consultant responsibilities) and §493.1463 (Standard: General supervisor responsibilities)

It does not say that . . . in fact I don't believe any regulatory agency requires Management to be competent in any area of the lab - as long as they do not perform any testing.  If they test, they have to have a competency.

I agree with David.