The Job Application page is where you get an opportunity to review what you are about to submit, via email, to the Employer.

Note that if we have determined that you have already applied for this position, it will be made perfectly clear on this page. It is important that you have a good reason for reapplying for a position (e.g. it was re-advertised, you needed to add more detail to your resume) and you should explain the reason in your Cover Note.

Employers will likely be unimpressed by multiple applications for the same position, without a valid reason for doing so.