According to Trimet you only ask 1, is it a service animal?
The driver asked the two questions he's supposed to under federal law:
Is that a service animal? (The man said yes.) And, What service does
that animal provide? When the man wouldn't provide an answer to the
second question, he and his iguana weren't allowed to board the bus,
according to C-Tran.
C-Tran riders stretch definition of service animal | The Columbian