You submit the final version to both your supervisors and the second reader. The supervisors (jointly) propose a grade. If the second reader is not convinced the grade is justified, he consults with the supervisor(s). If the consultation results in agreement, the new jointly established grade (which may but need not be the original grade) is awarded. If no agreement is reached, the second reader awards his own grade, and the average of the original grade and the reader's grade is awarded as the final grade. If the final grade is a passing grade the thesis cannot be withdrawn for the purpose of correction and resubmission.
The supervisors and reader will fill out and sign the forms (see below) required by faculty regulations. In case the independent reader cannot physically sign the form another proof of consent can be provided.
It is essential to make good arrangements with your supervisors and the reader about when you are going to hand in the final version and when they will be able to have it graded, especially if you plan to formally graduate before the end of your second year. Please keep in mind that the independent reader will require time to prepare his evaluation of your thesis. No thesis grade will be entered into OSIRIS without the reader's consent.