Advance polling stations and polling stations on polling day   Advance polling stations are: those general advance polling stations in Finland the number and location of which the municipal board decides and, unless there are specific grounds for deciding otherwise, there shall be at least one in each municipality; Finnish embassies and their offices as laid down by a Government Decree; hospitals, operational units of the social services offering round-the-clock treatment and other units determined by the municipal board and prisons (institution); Finnish ships which are abroad when the advance vote is being conducted. In addition, the advance vote may, subject to the conditions laid down subsequently, be conducted in the voter's residence (at-home voting).   Each voting district has a polling day polling station determined by the municipal board. For specific reasons, the polling station may be situated outside the voting district or the municipality, if this does not cause undue hardship to the voters.   The municipal board shall see to it that the name, address, opening days and daily opening hours of each general advance polling station in the municipality and the name and address of the polling day polling station and other information specified by the Ministry of Justice is registered without undue delay in the polling station register maintained by the Population Register Centre. Those general advance polling stations and polling day polling stations in Finland which have been registered in the polling station register by the end of the day 51 days prior to the election shall be the polling stations used in the election even if a claim for rectification submitted against the decision of the municipal board referred to in this section has not been processed and even if the municipal appeal submitted to the Administrative Court seeking to change the decision has not been settled. The claim for rectification submitted to the municipal board and the municipal appeal submitted against the decision of the municipal board shall be processed urgently. The decision of the Administrative Court regarding the appeal is not subject to appeal.