Preservation of documents.

9.  The listed entity shall have a policy for preservation of documents, approved by its board of directors, classifying them in at least two categories as follows-

(a)       documents whose preservation shall be permanent in nature ;

(b)     documents with preservation period of not less than eight years after completion of the relevant transactions:

Provided that the listed entity may keep documents specified in clauses (a) and (b) in electronic mode.