Another related question: When I received the welcome call a week ago or so, they said the status would come live April 1st, which meant, as confirmed by them, that the review period would end April 30th 2014. Website now says March 31st 2014, which would be correct if they have moved the 'go-live' date forward by one day - anybody have any info on this?
For renewal purposes, you get 12 months, so with status starting on April 1, will give until 31 March to attain the required tier miles to renew , so 31 March would be correct
13 months is used to determine promotion , not renewal