IAB extends ads.txt standard to apps in continued attempt to fight online ad fraud
IAB Australia has released its apps-ads.txt as part of the fight against online ad fraud, advising media buyers they should actively look for app-ads.txt files along with ads.txt files when reviewing advertising inventory.
The IAB has also recommended local publishers quickly adopt the solution to help limit the spread of counterfeit programmatic advertising inventory, estimated by consultancy Emarketer to cost the ad industry up to US$19bn a year globally.

Yeah this was released globally by the IAB US back in February. Nice try though at “cross industry collaboration”.
No mention of the huge gaping flaws with ads.txt which anyone can find by googling.