How to propose the closure of a site

Question

Once the site gets out of beta, is there any requirement for it to stay open?

For sites that have been abandoned by the proposers and drifted quite far from the proposal, is there a process for that or people just propose a new site if they so desire?

Answer 1

See Graduation, site closure, and a clearer outlook on the health of SE sites -- basically, a site is kept open as long as there is a community around to answer questions and keep things clean.