Is change permanent?
Change is permanent.  

The Laws of Nature (Dhamma) are permanent. 

The unchanging Nibbana (Nirvana) is also permanent. 

Buddhism explains only conditioned things (sankhara) are impermanent; thus conditioned impermanent things are permanently impermanent. 

The Dhamma (Natural Truth) is permanent (but not-self).

This is standard Buddhism, as follows:


  
  "All conditioned (sankhara) things are impermanent".
  "All conditioned things (sankhara) are unsatisfactory".
  "All things (dhamma) are not-self".
  
  
  Dhammapada