Apple has revised its App Store policies to clarify how developers can connect to external payment platforms, as reported by 9to5Mac. Developers will continue to owe Apple a commission if they utilize an external payment platform. Apple will take a 27 percent commission (compared to the usual 30 percent in many instances) or 12 percent if a developer is a member of the App Store Small Business Program, as stated on a support page about external purchase links.

The App Store Review Guidelines further details the new rules for developers who wish to link to alternative payment methods, such as the requirement to apply for an “entitlement” to enable them. Developers are also prohibited from exclusively accepting payments from outside Apple’s ecosystem; they must also offer Apple’s in-app purchase system in their apps.

The updates come in the wake of the Supreme Court’s decision to decline the appeals from Apple and Epic regarding the Epic Games v. Apple verdict, which mandated Apple to cease its anti-steering regulations.

Tim Sweeney, the founder and CEO of Epic, is dissatisfied with Apple’s policy updates. He labels the 27 percent fee as “anticompetitive,” criticizes the rules Apple has set for the appearance and functionality of the links, and draws attention to what he terms the “scare screen” that users encounter when they exit an app to visit an external site.

He declares that Epic “will challenge Apple’s insincere compliance plan in District Court.” Apple has also outlined its compliance with the ruling in a new court filing, and Natalie Munoz, a spokesperson for Epic, states that “we plan to dispute Apple’s Notice of Compliance at the District Court.”