The cornerstone of the National Front's manifesto since 1974 has been the compulsory deportation of all non-white immigrants, along with their descendants, as well as the white British partners in mixed-race relationships. It stated that the "repatriation" process could take ten years, adding that before deportation, non-whites would be stripped of British citizenship and placed behind white Britons when it comes to access to welfare, education, and housing. It accompanied this with a call to prohibit future non-white migration to Britain. In the 1970s, the NF stated that it did not oppose the arrival of white immigrants from Commonwealth countries, but called for "firm controls" on the migration of whites from elsewhere.