4010X098(A1), in loop 2300, segment CRC, qualfier 07, elements 2 and 3, pages 257, 258 in the guidelines. Element 3 is the condition code related to ambulance services. Element 2 is whether the condition codes apply.
The whole segment is required if the CR1 segment us used, furthermore, element 3 is listed as required even if element 2 specifies that it is not to be used in adjudication.