It doesn’t matter what the bill says just like it doesn’t matter what immigration law says. What makes you believe that illegal aliens will comply with in state tuition requirements when they don’t abide by any other law?
What the bill says (by now, "the bill" is "the law in Texas") matters as a point of comparison with what proponents CLAIM are the requirements to obtain in-state tuition. "On a path to citizenship" and "working toward citizenship" is, in actuality, filing a paper with the sate that says the person will apply for legal presence, when such an application is possible under federal law.
IMO, that act does not amount to "on a path toward citizenship."