Can CDC or Change Tracking be against a read only secondary?

Question

We will be deploying SQL Server 2012 Availability Groups with read only secondaries and would like to execute our SSIS extracts against the secondary while utilizing CDC or change tracking (the decision hasn't been made as to which will be used at this time).

I am hoping that the underlying implementations of CDC and CT would allow for their functionality to exist and be consumed on the secondary but have not yet been able to find anything stating this one way or the other.

Does anyone have any experience (and better yet official documentation) that points to the viability of this solution (or not)?

We are leaning toward Change Tracking at this point because we do not have a hard requirement for historical data but I would like to be able to identify any issues/risks for either implementation.