为啥不看官网信息呢？Change in the principal applicant A change in principal applicant for a family class sponsorship can only occur in a sponsorship application for a parent or grandparent and their dependent spouse or common law partner. If the principal applicant passes away during processing of the application, an officer is authorized to process the surviving spouse or partner as the principal applicant. To qualify, that person must be a family class member in their own right, i.e. also be the sponsor’s parent or grandparent.