You need at least 1000/350/200/200 (US1/EU1/AP1/SLC) audit and 504 hours elapsed.
100 was bumped because we didn’t have the time based settings what is implemented since that time. Now that we have it, likely the amount based audit will be decreased (but as we have more audits, 1000 audit can be done in less than 21 hours. Shouldn’t make any big difference)