1. What is the criterion to calculate the number of seats to be provided if chairs with back and arms are proposed in a permanent theatre?
A 25 person/9.5 m2 of effective floor area
B 20 persons/9.5 m2 of effective floor area
C 20 persons/9.5 m2 of auditorium area
D 25 persons/9.5 m2 of balcony area
