Property noc preparation

Assalamualaikum,

I want to inquire that who is liable to prepare noc for any property? A buyer or a seller?

Please give referenced answer and kindly reply as soon as possible.

Mostly seller is liable to obtain NOC

Follow the link below

http://awhosena.in/pdf/NOC-20Format-20Where-20Flat-20Jointly-20Regd.pdf