Based on the cited policy quote from College Board, the relevant evidence is that the policy allows the calculator category used by the Casio fx-991EX while separate restrictions still apply. The stored calculator data describes this model as a standalone scientific calculator and records whether it has CAS. This note does not approve apps, emulators, future variants, or use outside the exam context described in the verdict.
“Graphic, scientific, and 4-function calculators are allowed, subject to the restrictions below.”