That is not just a diplomatic courtesy.

The reason given by the Israelis: he had breached diplomatic courtesy by not coordinating his arrival with them.

But you're not allowed to dip it as a diplomatic courtesy.

Entitled to diplomatic courtesies, in that case.

As admiral of your remaining force, you are entitled to diplomatic courtesy.

"How about something to wash away the taste of the diplomatic courtesies?"

Bending double, his face close to it, Kirk had to admit that he felt rather a fool extending grave diplomatic courtesies to the creature.

In most cases, this is a "diplomatic courtesy."

They say it has offended diplomatic courtesies, ignored most important Community regulations and demonstrated neither solidarity nor team spirit.

It was, I thought, as if Cemetery were some sort of government, entitled to diplomatic courtesy from everyone who might come visiting.