Hello, I am a fresher just about to step into HR. As far as I have read about statutory compliances related to PF, it is true that employees whose salary is above 15,000 are not eligible. However, they cannot be completely exempted from contribution; they can contribute a straight 1,800. Additionally, there is also VPF (Voluntary Provident Fund) that allows employees to contribute more than the ceiling limit if they want.
Hope this helps.