Apple on Tuesday responded to reports that it has changed its policies regarding in-app purchases from the App Store.

[ad#Google Adsense 300×250 in story]”We have not changed our developer terms or guidelines,” Apple spokesperson, Trudy Muller, told The Loop. “We are now requiring that if an app offers customers the ability to purchase books outside of the app, that the same option is also available to customers from within the app with in-app purchase.”

Earlier today Sony said its e-reader app had been refused by Apple. Sony said they were told by Apple that “from now on, all in-app purchases would have to go through Apple.”

That appears to be only partly correct. Apple will require Sony to make those purchases available from within the app as well as outside the app before the app is accepted.

It would seem that Amazon will have to make similar changes to its app as well.