(a) In case of an individual or an association of individuals who do not appear by their duly authorized agent, the statement of each applicant, showing whether he is a native or naturalized citizen, when and where born, and his residence, will be required.

(b) In case an applicant has declared his intention to become a citizen or has been naturalized, his statement must show the date, place, and the court before which he declared his intention, or from which his certificate of citizenship issued, and present residence.