(a)Personal appearance of applicant before consular officer. Every alien applying for an immigrant visa, including an alien whose application is executed by another person pursuant to § 42.63 , shall be required to appear personally before a consular officer for the execution of the application or, if in Taiwan, before a designated officer of the American Institute in Taiwan, except that the personal appearance of any child under the age of 14 may be waived at the officer's discretion. (b)Interview