http://www.legislation.gov.uk/id/ukpga/1977/38

http://www.legislation.gov.uk/ukpga/1977/38/section/13

Administration of Justice Act 1977

An Act to make further provision with respect to the administration of justice and matters connected therewith, to alter the method of protecting mortgages of registered land and to amend the law relating to oaths and affirmations and to the interest of a surviving spouse in an intestate’s estate.