Adverb
(of a role, title, privilege, etc.) Given exclusively to one specific person, and not transferrable to or heritable by others.
bishop ad personam
Targeted at one person or group of people in particular, but not generally applicable to the entire community.
The decriminalization of accounting fraud was a law ad personam intended save the President from legal trouble.
Synonym: ad hominem.
Source: en.wiktionary.org