Warrant is a concept important to the World Federation.
It designates individuals, entities (companies, organizations,...) or even States who hold a certain degree of responsibility and/or is a representative of another citizen.
It pushes beyond the simple meaning of legal tutor/guarantor/responsible for as everything is part of the justice to be passed upon, therefore the meaning of “shared responsibility”.
It is mostly used as "judiciary warrants" but also legal warrants (act by proxy, etc.) - some citizen classes require warrants.
Parents are automatically warrants of their children up to age 11. Starting from age 11, children can change or remove warrants (will still need a warrant), otherwise it will stay as it is.
At majority age (16), the warrants are automatically removed and has to be updated (or left blank).
Even if it is left blank, some actions require warrants. (Renting, etc.)
It is usual that married couples put each other as warrants.
The number is however not limited to one but then both warrants hold the same level of responsibility, even if only one is active at a situation requiring a warrant.
Some citizen classes require warrants which should be at a higher class (for P-class and Z-class) or at least N-class (for W-class). Most warrants are used to share part of responsibility for duty failures of the citizen being under warrant. This is where warrants are most used.
The IBOCR personally uses the concept of warrant as a loyalty / trust system between their members, deviating from the original legal use.
Usually if one was wrongly “warranted”, before the justice themselves get to him, the faulted may already have disappeared in some horrible accident (or plainly disappeared).
It is considered the highest honor to be under warrant of a higher ranked IBOCR member, especially from veterans.
A State can also legally be a warrant to a citizen (usually through the State’s representative) , at least temporary for judiciary cases that go to higher courts. In such cases, a State executive would most likely attend the court.