The patent law regime in Singapore is governed by the Patents Act (Chapter 221) which is based generally on the UK Patents Act 1977. The Patents Act was amended in 1995 to delete Section 13(2) of the Patents Act 1994 [UK Patents 1977, S 1(2)] which declared that certain subject matter, such as "a scheme, rule or method for performing a mental act, playing a game or doing business, or a program for a computer", are not inventions for the purposes of the Act and are therefore not patentable. This left the law open for including business methods and computer implemented inventions as patentable subject matter.