05 October 2014
Bar Council Rules don't allow practice of any other profession. kindly refer Section VII of Chapter II of Bar Council of India Rules
Further, you may refer to Supreme Court judgment in the case of Dr.) Haniraj L. Chulani Vs. Bar Council of Maharashtra & Goa [1996] INSC 505 (8 April 1996)
The judgment is available at http://www.advocatekhoj.com/library/judgments/index.php?go=1996/april/27.php