(1)代理权范围；授权范围
在代理法中，它不仅指本人给予代理人的实际授权〔actual authorization〕，而且包括那些表见地或默示地〔apparently or impliedly〕授予代理人的权限范围。根据僱主负责〔respondeat superior〕原则，代理人在其实际授权或表见授权范围内所缔结的合同，由本人对此承担责任。

(2)(政府官员的)权限范围
包括政府官员根据其合法权限所能实施的行为。

• ad primam diem litigii
• ad probandum aliquid per credentiam duodecim hominum vicinorum
• adpromissor
• ad propinquiorem consanguineum
• ad prosequendam
• Ad proximum antecedens fiat relatio nisi impediatur sententia.
• ad publicam vindicatam
• ad punctum temporis
• ad quaerimoniam
• Ad quaestionem facti non respondent judices; ad quaestionem juris non respondent juratores.
• Ad quaestionem legis respondent judices.
• Ad quaestiones juris respondent judices; ad quaestiones facti respondent juratores.
• Ad quaestiones legis judices, et non juratores, respondent.
• ad quem
• Ad questiones facti non respondent judices; ad questiones legis non respondent juratores.
• adquieto
• adquirere
• adquiritur possessio
• rules of court
• rules of criminal procedure
• Rules of Decision Act
• rules of descent
• rules of evidence
• rules of good seamanship
• rules of navigation