Apple's nye version af Section 3.3.1. - i deres iPhone Program Developer License Agreement
http://www.updatedminds.com"3.3.1 - Applications may only use Documented APIs in the manner prescribed by Apple and must not use or call any private APIs. <br>Applications must be originally written in Objective-C, C, C + +, or JavaScript as executed by the iPhone OS WebKit engine, <br>and only code written in C, C + +, and Objective-C may compile and link directly against the Documented APIs <br>(eg, Applications that link two Documented APIs through an intermediary translation or compatibility layer or tool are prohibited). "
