If an author sees their level listed here and does not like that, I will remove it.
Basically if the maps are released, they can be reviewed, but I will respect the wishes of the author (or authors) and remove a listed map if requested.
In 2020, with so few new maps being made, I feel like uncovering "buried treasures" is one of the best ways to help keep supporting LvL (in addition to donations) with new content. And since most people have never heard of these old maps, they'll basically be new to most people anyway. Of course, as Tig said, one should check the readme first to make sure redistribution is okay (there was one map I found that I really wanted to send in because I thought it was really cool, but the author required permission to even redistribute it for free, regardless of whether it's for profit or not), and of course one shouldn't send in betas or alpha builds, something which I'll fully admit to having made the mistake of doing years ago but recognize and try to avoid now. So it is possible to still respect the authors and send in their maps (and keep a high level of quality in place while doing so), because most authors are generally okay with having their maps redistributed as long as it's not for profit and the readme file / map assets are left undisturbed, with few exceptions like the one I mentioned earlier, which I'll gladly respect.
Edited 11.93 minutes after the original posting.
There's another map that also requires permission for redistributing regardless of method, and that is "Tones of Twice" (ws.q3df.org/map/tonesoftwice/) by Mike S., but his contact details are floating. If anyone has any leads, let me know.
I've also recently sent in the other following maps besides Bullet in the Gun, which had no restrictions on free redistribution:
I do kinda agree with leilei. given someone apparently already submitted a level here as their own, if that has gone around the circuits it might have painted LvL in a somewhat negative light in the minds of some people. I think maybe some authors also have avoided submitting to LvL because they don't like the reviews maps get. Especially promode. Really what else is there to say about a map, but some don't like the fact that reviewer's don't taken promode into account when rating or reviewing maps. Petty, I know, but you still have to respect their right to control submission of their work, regardless of the reasons. Just look at youtube and the music situation. it is common for people to upload other artist's music rather than produce their own content. so I think as a sign of courtesy and respect, in the first instance one should contact the author direct.
on the other hand - most author's want their maps to be played and promoted - and most readme's allow for non-commercial free distribution so I agree with Tig. In the case you mentioned above, just keep a record that shows you at least tried to make contact. it's not really your fault either if contact details are no longer up to date. so as long as you tried I don't see a problem there. just dbl check with tig first.