A green paper is a statement by the government, not of policy already determined, but of proposals put before the nation for discussion. Like a white paper, a green paper is an official document sponsored by the Crown. (Traditionally, green papers were printed on green paper to distinguish them from white papers.) A green paper is produced early in the policy-making process, when ministers are still formulating their proposals. Many white papers in Canada have been, in effect, green papers. And at least one green paper — the 1975 Green Paper on Immigration and Population — was released for public debate after the government had already drafted legislation.