One of India’s highest courts has banned foreign law firms from all forms of practice in India, a major victory for a trade group of Indian lawyers and a defeat for firms that opened liaison offices in India during a brief window in the 1990s, according to the blog Legally India.

Representatives of the three firms immediately affected by the ruling — Ashurst, White & Case and Chadbourne & Parke — have confirmed the nature of the decision and said they are reviewing its implications, according to Legally India and media contacts at two firms that we contacted early Wednesday. Only Ashurst still has an open liaison office in India, and the firm’s Web site specifies that the office does not provide legal advice. White & Case conducts much of its India practice from offices in Singapore, a spokesman tells us.