Roc requuirement if any?

Respected CA group,

Pls clarify me on this issue,

                   One my clients i.e Pvt ltd co. (having paid up capital of 1 lakh)is aquiring a whole unit from a proprietory concern,in which one of the directors is proprietor.Is there any specific ROC compliances need to be complied by PVT Co in this aspect.            

Thanking you,

Rama chandra (CA-Final)