Ocean power in New Zealand speed. Because the tidal speed doubles, eight times more tidal power can be produced at spring tides than at neap tides. The entrance to Kaipara Harbour, one of the largest harbours in the world, is a channel to the Tasman Sea. It narrows to a width of , and is over deep in parts. On average, Kaipara tides rise and fall . At high tide, nearly 1000 square kilometres are flooded. Spring tidal flows reach 9 km/h (5 knots) in the entrance channel and move 1,990 million cubic metres per tidal movement or 7,960 million cubic meters daily. In 2011,
Acts of Parliament of the United Kingdom relating to the European Communities and the European Union Acts of Parliament of the United Kingdom relating to the European Communities and the European Union This is a list of current, amended, spent and repealed Acts of the Parliament of the United Kingdom relating to its membership of the European Communities and the European Union from 1972 to the present. Some of the acts (particularly the European Communities Act 1972 and the European Union (Withdrawal) Act 2018 represent some of the most important constitutional legislation currently on the statue book . This act legislated for the accession of the United Kingdom to the European Communities which later became the