Hate to disagree, but at most, censorship boards existed in eight states (Maryland, New York, Florida, Ohio, Pennsylvania, Viriginia, Kansas, Massachusetts), plus numerous municipalities.
The Interracial Film Festival:
The Squaw Man (1914), The Cheat (1915), The Planter (1917), The Renaissance at Charleroi (1917), The Tenderfoot (1917), The Squaw Man (1918), Vengeance (1918), The Last of the Mohicans (1920), Toll of the Sea (1922), Oklahoma Jim (1931), The Squaw Man (1931), Daughter of the Dragon (1931), The Forty-Niners (1932), The Bitter Tea of General Yen (1932), Madame Butterfly (1932), Imitation of Life (1934), Mutiny on the Bounty (1935), Rescue Squad (1935), Anthony Adverse (1936), The Last of the Mohicans (1936), Show Boat (1936), Lost Horizon (1937), God’s Step Children (1938), The Shanghai Gesture (1942), White Cargo (1942), Unconquered (1948), Pinky (1949), Right Cross (1950), Samson and Delilah (1950), Broken Arrow (1950), The Last Outpost (1951), The Big Sky (1952), Fort Ti (1953), Othello (1955), Untamed (1955), White Feather (1955), The Violent Men (1955), Raw Edge (1956), The Searchers (1956), The Halliday Brand (1957), Ride Out for Revenge (1957), Sayonara (1957), Island in the Sun (1957), Monkey on My Back (1957), Gun Fever (1958), Kings Go Forth (1958), Hong Kong Affair (1958), China Doll (1958), Man or Gun (1958), Imitation of Life (1959), I Passed for White (1960), Walk Like a Dragon (1960), The World of Suzie Wong (1961).
I believe the miscegenation part of the Production Code was repealed in 1947-1948. The Production Code Office apparently considered “miscegenation” to be only between white and black, not between white and Asian.