placet
A vote of assent, as of the governing body of a university, an ecclesiastical council, etc.
The assent of the civil power to the promulgation of an ecclesiastical ordinance.
The king […] annulled the royal placet.
1882, J. P. Peter (translator), Political History of Recent Times, 1816-1875: With Special Reference to Germany originally by Wilhelm Müller
Where it comes from
Latin placet (“it is pleasing”), inflection of placeō (“to be pleasing”).
Adapted from the Wiktionary entry placet (CC BY-SA 4.0).