This post is mostly sent out to new users of the site, because the users that have been here for a while already know how this works.
If you check through old applications and find logia type fruits (or any kind of fruit actually) that seems to be wildly inaccurate or has descriptions written down that say that it can transform into its element, between other things, these MUST be ignored. You CAN use the fruit, but even if the fruit was approved with a logia transformation in the past, the current rules and standards apply to it, and you are not allowed to use it that way.
If you have any doubts about a pre-existing fruit that seems dubious, please ask a Mod or an Admin.
Thank you for your understanding.