the electoral law provides that parties, federations, coalitions and groupings of electors are allowed to present lists of candidates. however, groupings of electors are required to secure the signature of at least 1 percent of the electors registered in the constituency for which they are seeking election—0.1 percent and, at least, the signature of 500 electors, until 1985—. also since 2011, parties, federations or coalitions who have not obtained a mandate in either house of parliament at the preceding election are required to secure the signature of at least 0.1 percent of the electors registered in the constituency for which they are seeking election. electors are barred from signing for more than one list of candidates. concurrently, parties and federations intending to enter in coalition to take part jointly at an election are required to inform the relevant electoral commission within ten days of the election being called.