Restrict User Search Period

Hi, I wonder whether someone could help me please. I know that I can restrict a users 'search period' by changing the **'Restrict search time range'** in the role settings, in my case 90 days. But I just wonder whether someone may be able to confirm for please whether the 90 days is 90 days prior to the date the search is performed i.e if the search was performed today it would be 90 prior which is 17 November 2015, or whether this restricts the user to extracting the data in 90 days chunks e.g. 1 November 2015 to 1 February 2016. Many thanks and kind regards Chris