Definitions of qualify
to be counted as, included as, or considered as etc
If your use qualifies as a fair use, then it would not be considered an illegal infringement.
to limit or restrict
The Commerce Clause, in no way qualifies the reach of the First Amendment.
to successfully finish a training course so that you are able to do a job; to have or achieve the necessary skills, etc
Six students qualified to apply for the four-year scholarship.