Addendum to Service Provider Interface Technical Specifications v1.50 Attachments Addendum to Service Provider Interface Technical Specifications v1.50 [1.8 MB]Listen to PDF Addendum to Service Provider Interface Technical Specifications v1.50 [1 MB] Date: 1 August 2014 Addendum to Service Provider Interface Specifications V1.60 Last updated: 18 June 2015 - 11:50am