Standards derived from the 1951 Refugee Convention and other international instruments that set the parameters for the treatment of refugees. The 1951 Convention provides for various standards of treatment, depending on the particular rights in question. These are: treatment not less favourable than that generally accorded to aliens in similar circumstances; the most favourable treatment accorded to nationals of a foreign country in the same circumstances; the same treatment as is granted to nationals; and treatment as favourable as possible.