the annual national convention and vote for the members of the National Spiritual Assembly. The members at the local level are free to vote for any adult Bahaʼi(s) in the district or unit in good standing, keeping in mind the guidance from Shoghi Effendi that the individuals should, "combine the necessary qualities of unquestioned loyalty, of selfless devotion, of a well-trained mind, of recognized ability and mature experience..." The delegates elected at the local level have two principal duties to carry out at the national convention – to elect the National Spiritual Assembly and to make recommendations to that body on issues relevant to it. In a process parallel to the one at the local level, the delegates to the national convention are free to vote for the nine individuals who they feel will best carry out the duties of the National Spiritual Assembly. They are also free to voice any relevant concerns they have to the delegation and to the outgoing and incoming Assemblies. While the delegates can certainly convey to the convention the concerns of those in their district, they are in no way obligated to represent those who elected them. In addition, no input is provided to the delegates, either at the local or national levels, on whom to vote for in the national election. Global Every five years from 1963, members of all National Spiritual Assemblies are called to vote at an International Convention at the Baháʼí World Centre in Haifa, Israel for members of the Universal House of Justice. These members act as delegates in a manner similar to National Baháʼí elections. Those who are unable to attend send postal ballots. Service on multiple institutions Baháʼís may, depending on circumstances, serve on multiple institutions. Members of National Spiritual Assemblies have served on Local Spiritual Assemblies, and assistants within the appointed institutions may serve on Local Spiritual Assemblies. However, beyond this there are several practical limitations. National Spiritual Assemblies may ask Local Spiritual Assemblies to excuse those who are members of both bodies from executive positions, to free their time to do the work of that National Spiritual Assemblies. Members of the Auxiliary Boards appointed by the Counsellors who are elected to such an institution are asked to choose to serve either in their elected or appointed capacity, but not both. Members of the Universal House of Justice do not simultaneously serve on other elected bodies,