Question: When was self-government achieved in the location where Lord of the Rings was filmed?

Knowledge 1: The Lord of the Rings (film series)
Considered to be one of the biggest and most ambitious film projects ever undertaken, with an overall budget of $281 million (some sources say $310 - $330 million), the entire project took eight years, with the filming for all three films done simultaneously and entirely in New Zealand, Jackson's native country. Each film in the series also had special extended editions released on DVD a year after their respective theatrical releases. While the films follow the book's general storyline, they do omit some of the novel's plot elements and include some additions to and deviations from the source material. [SEP] Knowledge 2: British Empire
The path to independence for the white colonies of the British Empire began with the 1839 Durham Report, which proposed unification and self-government for Upper and Lower Canada, as a solution to political unrest there. This began with the passing of the Act of Union in 1840, which created the Province of Canada. Responsible government was first granted to Nova Scotia in 1848, and was soon extended to the other British North American colonies. With the passage of the British North America Act, 1867 by the British Parliament, Upper and Lower Canada, New Brunswick and Nova Scotia were formed into the Dominion of Canada, a confederation enjoying full self-government with the exception of international relations. Australia and New Zealand achieved similar levels of self-government after 1900, with the Australian colonies federating in 1901. The term "dominion status" was officially introduced at the Colonial Conference of 1907.
Knowledge 1: The Lord of the Rings (film series)
Considered to be one of the biggest and most ambitious film projects ever undertaken, with an overall budget of $281 million (some sources say $310 - $330 million), the entire project took eight years, with the filming for all three films done simultaneously and entirely in New Zealand, Jackson's native country. Each film in the series also had special extended editions released on DVD a year after their respective theatrical releases. While the films follow the book's general storyline, they do omit some of the novel's plot elements and include some additions to and deviations from the source material. [SEP] Knowledge 2: Sarah McLeod
Sarah McLeod (born 18 July 1971) is a New Zealand film and television actress. Her most notable role was in the Peter Jackson films The Lord of the Rings: The Fellowship of the Ring and The Lord of the Rings: The Return of the King as Rosie Cotton, a female hobbit who marries Samwise Gamgee. Her daughter Maisy played Rosie and Sam's baby. McLeod also co-starred in the New Zealand soap opera Shortland Street as Cindy Watson from 2008 to 2009.
Knowledge 1: Music of The Lord of the Rings film series
The music of The Lord of the Rings film series was composed, orchestrated, conducted and produced by Howard Shore. The scores are often considered to represent one of the greatest achievements in the history of film music in terms of length of the score, the size of the staged forces, the unusual instrumentation, the featured soloists, the multitude of musical styles and the number of recurring musical themes used. [SEP] Knowledge 2: Music of The Lord of the Rings film series
The music of The Lord of the Rings film series was composed, orchestrated, conducted and produced by Howard Shore. The scores are often considered to represent the greatest achievement in the history of film music in terms of length of the score, the size of the staged forces, the unusual instrumentation, the featured soloists, the multitude of musical styles and the number of leitmotifs used.

Answer: after 1900