qualifications

I heard many times in evangelical circles that 1 Timothy 3:4-5 and Titus 1:6 say that the children of an elder must be believers in order for the elder to be qualified for his position. Is this the right interpretation of the passages?

Hi all, I've never attended a church where anyone who spoke from the pulpit had any formal qualifications for preaching, except the pastor. Is it a requirement that people be qualified to preach in a church? If not, how can you decide who is suitable for preaching and teaching? Bern