Example file
"CUG Name","Phone Number","Valid From","Valid To"
Test CUG 1,61396630024,,
Test CUG 1,61396630025,,
Test CUG 2,0461112222,
↳ 2016-07-01T00:00:00+1000,2016-07-31T23:59:59+1000"CUG Name","Phone Number","Valid From","Valid To"
Test CUG 1,61396630024,,
Test CUG 1,61396630025,,
Test CUG 2,0461112222,
↳ 2016-07-01T00:00:00+1000,2016-07-31T23:59:59+1000