Another word for carte-blanche

You should never offer carte blanche to someone who just might take you up on it.

With this carte blanche in his pocket, Repnin proceeded to treat the diet as if it were already the slave of the Russian empress.

Since, in spite of this object-lesson, the Polish nobles still continued their offers, the peasants consulted the local Austrian authorities as to what course they should take; and the local authorities, unaccustomed to arriving at any decision without consulting Vienna, practically gave them carte blanche to do as they liked.

You have carte Blanche in the account of human lives.

But the Act does not offer carte Blanche for anyone who might now think bankruptcy is the easiest way out.