LISTSERV uses ':useradm.', which defaults  to ':admin.' if not specified.
No other  tag is honoured;  one of the main  reasons for screwing  up all
software  using people-related  information with  the new  format was  to
allow an arbitrary  number of people in  each role tag. If  you want your
techrep to have NAD authority, put  his name in ':useradm.' (or ':admin.'
if you don't have a ':useradm.'). Note  that if you add a ':useradm.' tag
when there  originally wasn't one, be  sure to copy the  people listed in
':admin.', or you  will exclude them. It all sounds  very complicated but
it is in fact much simpler than it  used to be: only one tag is used, all
the people listed there have authority,  and no-one else does. The tricky
part is to locate the tag  in question in the hierarchical structure, but
once you've found it it's very simple.
 
  Eric