.----------.                                .---------------.
   | Registry |                                | ICANN TMCH-CA |
   '----------'                                '---------------'
         |                                             |
 .----------------.                                    |
 | Periodically,  |                                    |
 |   at least     |                                    |
 | every 24 hours |                                    |
 '----------------'                                    |
         |                                             |
         |-------------------------------------------->|
         |     Download the latest TMV CRL file        |
         |<--------------------------------------------|
         |                                             |
         |                                             |