In this IQ range, and depending on other assessment data, I personally would begin to be more cautious about interpreting the GAI when PRI > VCI by 18 points or more. Other clinicians may have different cutoffs. Validly obtained scores don't really become inadmissable at any point, they just may hold less weight in the interpretation of a child's overall profile.

...pronounced like the long vowel and first letter of the alphabet...