Time is one of the most precious things a person can give at this time I would think that (having the time to commit oneself), some business knowledge, a large lump of common sense and a useable skill to bring to the table now if a member is putting their name forward then the aforsaid skills should be paramount but how are these skills going to be identified but through an interview? and who should do or is qualified to conduct the interview?
A body that is independant of the club and LISA would be the obvious choice but which one and who pays?
So no way would appear to be ideal, my suggestion (for what it's worth) would be for the LISA committee to conduct their own internal interviews and put forward the best 5 candidates, but good luck for those interviewers it's a horrible job interviewing people you know.
As for a vote of members to choose, well not a good idea just in case anyone gets accused of being in a clique or favouritism.
1st treat it like a job application ask for a cv, and a written application asking that the applicants qualities are listed, choose a shortlist from that, Internal interviews, then put forward the names. A long winded process yes but a fair one, isn't it?