Any person who alters a product by introducing a major change in type design, not great enough to require a new application for a type certificate under Article 9 of the regulations herein, shall apply to the CAA for a supplemental type certificate, except that the holder of a type certificate for the product may apply for amendment of the original type certificate in accordance with the requirement stipulated in Chapter 3 of the regulations herein. The application must be made on the appropriate form, including all the relevant design data. An applicant is entitled to a supplemental type certificate for an aircraft product (See Attachment 8) if his/her application is approved by CAA. The requirements of Article 23 must be complied with.Attachment 8 SUPPLEMENTAL TYPE CERTIFICATE.odt