With the entry into force of this new law, will I always be billed based on actual readings?
Yes, unless the meter is not accessible for reading. In this case the Distributing Company will leave a notice in your home giving you the contact methods to provide the reading. This will avoid accumulation of your home's electricity consumption, which can lead to higher than normal bills.
The Distributing company is responsible for recording the meter reading.
If a reading is not possible, your Distributing Company may estimate consumption based upon the in-force legislation.