The Centre has six months – till mid-October – to amicably settle the tax dispute with Netherlands-based Vodafone International Holdings BV (VIH), or face arbitration, say legal experts. By serving a notice on the Indian Government, VIH, a subsidiary of Vodafone, has acknowledged a tax dispute with Indian authorities on its $11.2-billion deal with Hutchison Whampoa in 2007. The notice was served under the India-Netherlands Bilateral Investment Treaty (BIT).