NRJ

As I understand that I need to nominate an occupation for VETAASESS skill assessment. If I am uncertain about which the profession is relevant for me. The reason being the task details given in ABS is for the unit group ,2241-which specifies detailed tasks for the group as a whole and just a sentence for a particular occupation ,say Actuary(224111) Confused as to the difference between UNIT task details and for the particular occupation? Someone can help me out to clear my confusion. Thanks