"Any comments about which actual figure one should be looking at for NTA. Should one look at the before tax or after tax figure? Any comments please on this."
For ARG, AUI, DUI, AFI, MLT, CHO and a handful of other 'traditional' LIC's : pre-tax NTA.
For other 'newer' LICs : after-tax NTA.
References :
1. ATO site - LIC Capital Gain Dividends
2. Recent MMA announcement
3. Recent ponderings Hotcopper CHO thread