Egypt's House of Representatives authorized President Abdel Fattah al-Sisi to take necessary measures to support Saudi Arabia in a two-thirds vote, France 24 reported; Ahram's translation of the House statement described the same threshold and authority [E1][E4].
The authorization is a legal gate, not a deployment order. A parliamentary statement shared with Reuters said support would follow a Saudi request, Al Jazeera reported, while The National said the approval does not mean troops will deploy immediately [E2][E3].
A statement called for extending all necessary and possible forms of support to Saudi Arabia to defend its security, stability, resources, territorial integrity and holy sites [E5]. The language gives the new authority a stated policy purpose, but it does not identify a unit, equipment, date or other concrete action.
Associated Press reported that a regional official briefed on the matter said Egypt will deploy air-defense systems and aircraft to help repel missiles and drones fired at Saudi Arabia [E6]. The official was not named.
The desk's reading. The forecast is 58% that Cairo publicly defines a concrete support measure by 31 October. The starting point is 50%, a neutral prior for an unresolved binary outcome because the available reporting provides no comparable historical base rate; the authorization, the stated support language and AP's reported plan lift the estimate, while the Saudi-request condition and absence of an immediate deployment keep it modest. The stronger competing reading is that the authority remains available but dormant and the reported plan does not become a public measure.
The next test. By 31 October, a statement from Egypt's presidency, military or parliament naming a measure — such as a deployment, equipment, unit or operational role — would confirm the call. If Cairo publishes no such measure by that date, the competing reading wins.