The assignee or receiver shall, immediately after his appointment, take, subscribe to, and file in the proper court, an oath or affirmation in the following form:

I, A.B., do solemnly swear (or affirm) that I am legally qualified to act as assignee (or receiver) of the estate of C.D., an insolvent; that I am not interested therein or adversely thereto; that I will faithfully manage said estate for the benefit of the creditors thereof, in the manner provided by law, and will fully and accurately account for all the assets. So help me God (or, and so I do affirm).