Micheál Martin (Cork South Central, Fianna Fail) | Oireachtas source

Under EU rules, our reduced VAT rate of 13.5% on energy prices cannot be reduced below 12%. If we were to attempt to reduce the rate to 9%, for example, for a few months, the VAT would revert to the standard rate of 23% because we would be opting out of the derogation we currently have. Again, the Deputy needs to put forward proposals that are credible and that can actually be delivered.

See this speech in context