Mobile Electoral Boards should be established wherever necessary and possible for voting  in smaller hospitals, smaller retirement or nursing homes, monasteries, convents, socio therapeutic correctional facilities and prisons. The Mobile Electoral Board comprises the  Electoral Officer of the respective polling district or his or her deputy and two assessors of  the Electoral Board. The municipal authority may, however, also instruct the Mobile  Electoral Board of another polling district in the municipality to take receipt of the ballot  papers.