oath of office
an official promise by a person who has been elected to a public office to fulfill the duties of the office according to the law
en-GB/ˈəʊθ əv ˈɒfɪs/
en-US/ˈoʊθ ʌv ˈɑfɪs/
an official promise by a person who has been elected to a public office to fulfill the duties of the office according to the law