Yes, Ms. Thomas, I think the term “cases of national significance” is a term of art here. It's the same wording used in the Supreme Court Act. It's directing the court to give a leave to appeal in the cases of national significance and has been used in the various iterations of the Court Challenges Program back to the 1970s.
My interpretation is that the program is intended to finance cases that would, in the program's view, eventually be eligible to find their way to the Supreme Court.