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These tests are requiring an online PIN after going ONLINE with an 0x31, 0x33 ARC issuer response. It’s a level 3 feature. These tests can be waived by AMEX (Jan 17, 2020).
GPO_PROC_166:
This test verifies the coherence between tags 9F33, 9F35, 9F6E and 9F6D.
Note: When Only EMV mode is not set in Byte 6, bit 7 of DF1B, the Mag-stripe must be also set in 9F33 Byte 1 bit 7