OP 52 – Digital File Format for Delivery of Commercials – MXF – Issue 2 – Effective 1 March 2017 https://www.freetv.com.au/wp-content/uploads/2019/08/OP-52-Digital-File-Format-for-Delivery-of-Commercials-MXF-Issue-2-Effective-1-March-2017.pdf