Interrex (Nova Roma)
According the the Nova Roman Constitution, if both consular positions were vacant at the same time, the Senate should appoint an interrex to serve a term lasting no more than five days. The interrex must be a member of the patrician order, and shall have all the powers and responsibilities of a normally elected consul. The interrex shall organize new elections in the comitia centuriata to elect two new consuls to serve out the remainder of the previous consuls' term of office.
- Interrex in the ancient Rome