ACATS 3.0 User's Guide
5.6.4 Inapplicable Tests
Each ACATS test has a test objective that is described 
in the test prologue. Some objectives address Ada language features that 
need not be supported by every Ada implementation (e.g., "check 
floating-point operations for digits 18"). These test programs generally 
also contain an explicit indication of their applicability and the expected 
behavior of an implementation for which they do not apply. 
Annex 
D, “
Test Applicability Criteria” 
lists common reasons for a test to be inapplicable, and lists the tests 
affected.
A test may be inapplicable 
for an implementation given: 
appropriate ACATS grading criteria; or
an ACAA ruling on a petition to accept a deviation 
from expected results. 
Appropriate grading 
criteria include: 
1.
whether a test completes execution and reports "NOT APPLICABLE";
2.
whether a test is rejected at compile or bind time for a reason that 
satisfies grading criteria stated in the test program. 
All applicable test programs must be processed and 
passed.