Cersei Bertram simply threw a token to him: "Take this for now. When we return, we'll register for you. Temporarily...you will be under Vanessa Thoughts of Shadow's command."
Vanessa Thoughts of Shadow also served as the Chief Flag in the Horizon Bureau. In theory, she should have dozens of people under her command, but due to her special status, she was still on her own.
Vanessa widened her eyes, quite surprised. Then she smiled mischievously, pleased to have him under her command. She thought, 'You've looked down on me several times, fool. Wait until they leave, and I'll let you know what it means to be under the authority of an official. Humph!'
Just as she was thinking this, she saw Owen Bertram looking at her with a strange look in his eyes, which made Vanessa almost jump. "How outrageous! Daring to scorn your superior!"