snap election, provided that no motion of no confidence was in process, no state of emergency was in force and that dissolution did not occur before one year had elapsed since the previous one. Additionally, both chambers were to be dissolved and a new election called if an investiture process failed to elect a prime minister within a two-month period from the first ballot. Barred this exception, there was no constitutional requirement for simultaneous elections for the Congress and the Senate. Still, as of there has been no precedent of separate elections taking place under the 1978 Constitution. The Cortes Generales were dissolved on 15 January 2008, after it was announced by Andalusian president Manuel Chaves in November 2007 that he had agreed with Zapatero to hold the 2008 Spanish general election and the regional election in Andalusia simultaneously on 9 March. Parliamentary composition The Cortes Generales were officially dissolved on 15 January 2008, after the publication of the dissolution decree in the Official State Gazette. The tables below show the composition of the parliamentary groups in both chambers at the time of dissolution. Parties and candidates The electoral law allowed for parties and federations registered in the interior ministry, coalitions and groupings of electors to present lists of candidates. Parties and federations intending to form a coalition ahead of an election were required to inform the relevant Electoral Commission within ten days of the election call, whereas groupings of electors needed to secure the signature of at least one percent of the electorate in the constituencies for which they sought election, disallowing electors from signing for more than one list of candidates. Below is a list of the main parties and electoral alliances which contested the election: In the Canary Islands, an alliance was formed between New Canaries (NC) and Nationalist Canarian Centre (CCN), two splinter groups from Canarian Coalition. In the Valencian Community, Valencian People's Initiative (IdPV)—splinter from United Left of the Valencian Country (EUPV)—joined a coalition with the Valencian Nationalist Bloc (Bloc) and The Greens–Ecologist Left of the Valencian Country (EVEE). Unity for the Isles, an electoral alliance based in the Balearic Islands, was formed by PSM–Nationalist Agreement (PSM–EN), Majorcan Union (UM), Republican Left of Catalonia (ERC), Agreement for Majorca (ExM) and The Greens of Menorca (EV–Me). Timetable The key dates are listed below (all times are CET. Note that the Canary Islands use WET (UTC+0) instead):