oath of office ne demek?
Resmi göreve başlama yemini
Göreve başlarken yapılan yemin

https://www.nedirnedemek.com/oath-of-office-ne-demek

An oath of office is an oath or affirmation a person takes before assuming the duties of an office, usually a position in government or within a religious body, although such oaths are sometimes required of officers of other organizations. Such oaths are often required by the laws of the state, religious body, or other organization before the person may actually exercise the powers of the office or organization.

https://en.m.wikipedia.org/wiki/Oath_of_office

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