These persons may administer an oath or affirmation or take an acknowledgment:

• a bankruptcy judge;

• a clerk;

• a deputy clerk;

• a United States trustee;

• an officer authorized to administer oaths in a proceeding before a federal court or by state law in the state where the oath is taken; or

• a United States diplomatic or consular officer in a foreign country.

If an oath is required, a solemn affirmation suffices.