In the 1952 film, Panam, NS Krishnan surreptitiously plugged DMK with a song titled Theena Moona Kaana. How did this song escape censorship?

In those days, the censor board didn't allow direct plugging of political parties. So NSK, igeniously explained away Theena Moona Kaana as Thirukkural Munnani Kazhagam in his song!