Procedures for sale of pvt ltd co shares held by pvt ltd co

A Raghavendra (Senior Executive - Finance & Corporate Affairs)   (67 Points)

10 May 2016  

Dear Memebers & Experts,

What are the procedures and formalities to be fulfilled in case of the following:

1) Private Limited company is holding a stake (Shares) in its associate Private Limited Company out of which it is willing to sell some of the shares to another private limited company which is not in our group.

what are the formalities to be complied with and also let me know the specific resolution format as well and what is the role of Parent company in this process.[i.e."A" company has alloted some shares to its associate Company"B", now associate Company"B" is intending to sell some of its shares to "C" which is not in the group, the role of Company"A" need to be explained with required formalities and specimens as well please]  

Raghav