Most legal systems allow third parties to intervene in legal proceedings where interests and rights might be directly implicated by the outcome. This is a particularly important right when the outcome of the case might effectively impose liability on the third party, or limit the third party’s rights. The constraint on the right of intervention is that the third party must have some reasonably direct connection to the subject matter of the lawsuit, rather than an interest driven by the policy issues at stake in the case or general legal precedents likely to be set by a decision in the case. See Amicus Curiæ.