CREATE TABLE table_203_109 (id DECIMAL, "treaty" TEXT, "organization" TEXT, "introduced" DECIMAL, "signed" DECIMAL, "ratified" DECIMAL)

what is the last treaty morocco ratified ?
SELECT "treaty" FROM table_203_109 ORDER BY "ratified" DESC LIMIT 1
SELECT "treaty" FROM "table_203_109" ORDER BY "ratified" DESC NULLS LAST LIMIT 1