Intra Vires，权力以内，在权限范围内；权力以内得到授权行事，必须在权力范围以内进行，才算是合法的行为，并没有得到授权而进行的事项，都属于权力以外。

Ultra Vires，超越权限（源自于拉丁语）。没有得到授权而进行的事项，都属于权力以外

Ultra vires hereditarias 不受遗产额的限制

Ultra vires doctrine 越权原则越权行为原则

Directors ultra vires 董事越权

Ultra vires action 越权行为越权行动

参考双语例句：

He observed that State officials enjoy immunity ratione materiae in respect of acts performed in an official capacity since these acts are considered acts of the State, and these included unlawful acts and acts ultra vires.

他认为，国家官员以官方身份实施的行动享有属事豁免，因为这些行为可视作国家的行为，非法行为和越权行为也包括在内。

Recalling that immunity ratione materiae was a reflection of the immunity of the State, some members were of the opinion that ultra vires or unlawful acts should not be covered by such immunity since, in those situations, the official is acting neither under the instruction of the State nor under the authority of his functions.

一些委员回顾道，属事豁免是国家豁免的一种反映，他们认为，越权行为和非法行为不应涵盖在这种豁免之中，因为这些情况下，官员既非按国家指示行事，又非按其职权行事。

The jurisprudence of the Court is clear that if an organ which has been attributed a limited number of competences transgresses those competences, its acts would be ultra vires (Legality of the Use by a State of Nuclear Weapons in Armed Conflict, Advisory Opinion, I.C.J. Reports 1996 (I), p. 82; Phosphates in Morocco, Judgment, 1938, P.C.I.J., Series A/B, No. 74, p. 14).

法院的判例表明，如果一个被授予有限职权的机构逾越这些职权，其行为就是越权《国家在武装冲突中使用核武器的合法性，咨询意见，1996 年国际法院案例汇编(I)》，第82页；《摩洛哥境内的磷酸盐案，判决，1938 年常设国际法院案例汇编，A/B辑，第74号》，第14页)。

the illegality, invalidity or unenforceability of, or any defect in, any provision of any document relating to the Margin Facility or Options Account or any security, guarantee or indemnity (including the Charge) or any of the rights or obligations of any of the parties under or in connection with any such document or any security, guarantee or indemnity (including the Charge), whether on the ground of ultra vires, not being in the interests of the relevant person or not having been duly authorized, executed or delivered by any person or for any other reason whatsoever

涉及保证金融资或期权帐户的有关任何抵押、担保或弥偿(包括押记)的任何文件的条文或押记之下或与该等抵押、担保或或弥偿(包括押记)之下或有关的任何一方的任何权利或义务及有关的条文的不合法性，无效或未能执行或缺陷，不论原因是基于越权、不符合有关人士的利益或任何人未经妥善授权、未经妥善签立或交付或因为任何其他的缘故

来源：译问