3. After regulation 2 of the principal Regulations (particulars to be supplied on an application for registration), there shall be inserted–
2A. An applicant for registration under Part I of the Act shall, if the registration authority so requires, supply to that authority such birth certificate and such other documentary evidence as is specified by that authority as being necessary to substantiate the information supplied in accordance with paragraphs 1(a) or 2(a)(i) of Schedule 1 to these Regulations.”.