BLE SIG Certification, Reference design to be used to obtain EPL

Hi, does anyone know if there is a document in which is explained, by Nordic, how to obtain a bluetooth certification using nRF51822 and S110 Stack ?

I know if a reference design is strictly followed the customer do not need to do a new certification.

Are available from Nordic qualified reference design to be adopted to obtain EPL (End Product List) without new certification ?

Thank you.