There is no ``submit'' button in XRPS. Submission of a proposal is performed by hitting the ``upload file'' button at the bottom of the web page reporting the check results, where one can enter the path to the file containing the scientific justification (see above). As soon as the scientific justification has been uploaded, a message will appear on the screen notifying the user of the proposal submission and prompting him/her to return to the XRPS entry page.
Note: Successful submission does not imply that all details of the proposal are formally correct or complete, because the formal checks performed by XRPS are not complete.