Can you exclude me with a low requirement?
When one enters the crazy world of public tenders, the theme of "reckless leave" is that ghost that everyone knows. Basically, we talk about when an offering throws such a low price that even the public administration lifts the eyebrow and thinks: "Are you really going to be able to meet that?" It is not uncommon for people to take them from the play for getting ready with an offer too cheap.
Now, about whether they can throw you without warning ... Well look, in theory yes, but it is not as simple as a carrier in the face. There are rules. The public sector contract law in Spain (the famous LCSP, for friends) says in its article 149 that if your offer seems taken from an eternal Black Friday, the administration can look at it with magnifying glass and reject it. But be careful, before the fulminating expulsion they have to ask for explanations in writing. That is, they are not discarding good at first, but if your justification sounds like a Chinese story or answers, bye bye offer.
Of course, the LCSP does not get too wet and does not put a magical number to say "this offer is dangerously low." Each entity plays a little by eye, what can be frustrating, but life is. If your price sounds weird and do not convince your reasons, then leave out.
My colleague advice: If you are going to get in these waters, do your homework well. Calculate your costs, do not flu down prices just to win. If the administration asks for explanations, have them ready and that sound credible. Nothing to improvise.
In short, yes, they can exclude you by recklessness, but it is not as crazy as some think. There is a process and, no matter how much the system has its things, the idea is that it is just for everyone. So find out, get ready, and don't play it with impossible offers.