He finally inclined his head, ever so slightly, the minimum sketch of courtesy required in his culture.

As a Vulcan, Spock had no trouble treating them with the courtesy required by a diplomatic mission.

He looked away, as courtesy required when prying past propriety.

He hesitated, holding her hand longer than the courtesy required, and he frowned slightly.

Wang-mu of course agreed to follow, as courtesy required, and Peter wordlessly went along.

Yet, we are treating you with all the courtesies required by the Treaty of Algeron--which, I will point out, you yourself have broken.

Piemur waited until the journeyman had chatted, as courtesy required, and then he skipped to the front of the stall before anyone else could intervene.

M'Ress and Arex reflexively rose, as courtesy and protocol required.

Jord bowed to the visitors, as courtesy required.

"Thank you for inviting us over, Honor," White Haven said, holding onto her hand for perhaps a heartbeat longer than simple courtesy required.