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Once you have completed all the sections, check that none of them has a red exclamation mark in the header, which would indicate a problem to be addressed before it the request can be submitted. Once all the details are correct, click the blue “Save Draft” button at the top right of the page, then the green “Submit Request” button. You will land on a page summarising your request and marking it as "Pending". If you spot any errors, click the cog button to cancel it. You can then return to the draft using the “Drafts” button at the top of the “Submit Observation” page; click the blue icon in the “Load” column beside the relevant request, edit accordingly, save again and resubmit.
You can return to a saved draft at any time to use as a template for a similar request.