As a result, the Public Works Act of 1870 standardised the gauge to be used, and Otago's first railway, the Port Chalmers railway, was built to the new "standard" narrow gauge.
Como resultado, a Lei de Obras Públicas de 1870 (Public Works Act) tivo que estandarizar o ancho de vía, e o primeiro ferrocarril de Otago, a liña de Port Chalmers, construír co novo estándar.