Aliens — Refugees — Asylum — United Nations Protocol relating to the Status of Refugees, 1967 — United States Refugee Act 1980 — Well-founded fear of persecution — Meaning — Whether applicant for asylum required to show clear probability of persecution in order to establish well — founded fear — Distinction between discretionary provisions on asylum and mandatory provision on withholding deportation — Language and legislative history of the Refugee Act 1980 — Whether passed to give effect to the 1967 Protocol

Relationship of international law and municipal law — Treaties — Interpretation — By municipal courts — United Nations High Commissioner for Refugees — Extent to which United States court should take note of High Commissioner’s interpretation of United Nations Protocol relating to the Status of Refugees, 1967

Treaties — Interpretation — Agencies of interpretation — United Nations High Commissioner for Refugees — Extent to which United States court should take note of High Commissioner’s interpretation of United Nations Protocol relating to the Status of Refugees, 1967 — The law of the United States