Shinzon says to Iayda, "I also felt that Darune is slowly coming out of slumber.  I was also a born vampire, remember, my family was one of the first after the creation of the first vampire.  And yes I remember Alexander.  And I hoped you remembered that it was Darune that set up the rule I just mentioned for our own safety...we can't just go out and bite or turn people whenever we feel like it."