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

how long did it take for the international covenant on civil and political rights to be signed before it was ratified ?
SELECT "signed" - "introduced" FROM table_203_109 WHERE "treaty" = 'international covenant on civil and political rights'
SELECT "signed" - "introduced" FROM "table_203_109" WHERE "treaty" = 'international covenant on civil and political rights'