Service Tax registration in India involves filing Form ST-1 in duplicate along with a copy of the PAN card and proof of address. A person liable for paying Service Tax must register within 30 days of becoming liable or a new taxable service coming into effect. Registration involves assigning a Service Tax Code based on the PAN number. The registration certificate will be granted within 7 days normally. A fresh registration is needed if ownership of the business is transferred to another person.