This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.
Q: In 1977, two thirds of the Presbyterian Church of Australia, along with most of the Congregational Union of Australia and all the Methodist Church of Australasia, combined to form the Uniting Church in Australia. The third who did not unite had various reasons for so acting, often cultural attachment but often conservative theological or social views. The permission for the ordination of women given in 1974 was rescinded in 1991 without affecting the two or three existing woman ministers. The approval of women elders given in the 1960s has been rescinded in all states except New South Wales, which has the largest membership. The theology of the church is now generally conservative and Reformed. A number of small Presbyterian denominations have arisen since the 1950s through migration or schism.
A:
In what year did the Presbyterian Church of Australia , the Congregational Union of Australia , and all the Methodist Church of Australasia merge?