Ius singulare
（重定向自Jus singulare）
Ius singulare is Latin for "singular law". It was special law for certain groups of people, things, or legal relations (because of which it is an exception from the general principles of the legal system). An example of this is the law about wills written by people in the military during a campaign, which are exempt of the solemnities generally required for citizens when writing wills in normal circumstances.