CREATE TABLE table_3303 ("Season" FLOAT, "Champion" TEXT, "Second" TEXT, "Third" TEXT, "Team Champion" TEXT, "National Trophy/Rookie" TEXT)

Who is the champion if the national trophy/rookie is not held?
SELECT "Champion" FROM table_3303 WHERE "National Trophy/Rookie" = 'not held'
SELECT "Champion" FROM "table_3303" WHERE "National Trophy/Rookie" = 'not held'