This article seeks to assess the legal legacy of one of British India’s most significant emergency acts: Act XI of 1857, also known as the State Offences Act. Although introduced during the Indian Uprising of 1857, it will be argued that the extra-judicial provisions contained in this act exerted a strong influence on the legal character of post-1857 ‘special’ or exceptional colonial criminal legislation, an influence that continued to be reflected in the punitive emergency laws set in place in post-colonial India. The long-term historical significance of Act XI will be illustrated by examining some of the more notable pieces of punitive or repressive legislation enacted in colonial and post-colonial India, namely the Murderous Outrages Act of 1867, the 1915 Defence of India (Criminal Law Amendment) Act, the Anarchical and Revolutionary Crimes Act of 1919, the Defence of India Act, 1962, and, more recently, the Terrorist and Disruptive Activities (Prevention) Act of 1985.