Maintainance of statutory register in electronic form

Sir/Ma’am

As mention under Rule 27 of companies (management and administration ) Rule 2014 that every listed company is require to maintain its records in electronic form so my question is that how and from which date the records shall be enter in the Register.

for eg. If a company register under companies act 1956 in 1980 so my question is that have we copy the transaction occured before this Rule in new records( i.e. in electronic Form) ?