The Trade Union Act 2016 introduces a new minimum turnout threshold, requiring a ballot turnout of at least 50% of those eligible to vote in order for the industrial action to proceed, and an additional threshold in respect of important public services where at least 40% of those eligible to vote must vote 'yes' to the industrial action.
The relevant definitions of 'important public service' can be found by following the links below:
The draft regulations for decommissioning of nuclear installations and management of radioactive waste and spent fuel have not yet been published.
The draft regulations are set to come into force on 1 March 2017 or, if later, 21 days after the date the regulations are made. It is still unclear as to when the Trade Union Act 2016 will fully come into force.