No exposed nipples or crotch, not even a slight cameltoe or bikini bumps, and she's clearly of legal age
Unless a mod is feeling extremist when stumbling upon this, this doesn't go far enough to break the rules.
I've actually seen anime girl posts with them wearing LESS than this (as in naked) and it still counted as fine to stay by the mods because they were posed in ways to keep the no-no parts hidden.