You can't convert the CIS or CISE mechanical injection to electronic/change the injectors to electronic.

But you can update/backdate to the Digifant II electronic injection system. Then all the options to change and/or program the ECU become available and legal.

A third option available is to change/reprogram the CIS/CISE control-box/ECU using the existing injectors, but IMHO not worth the trouble.