To limit the probability that the calculation of loads due to earthquake will not take into account the forces due to expected seismic torsional moment at any level of the building, taking into account eccentricities between the centre of mass and the centre of rigidity, including accidental eccentricities such as those due to stiffening provided by non-structural building elements, which could lead to harm to persons.
To direct Code users to Sentence 4.1.8.11.(7) for the calculation of the lateral force at each level of the building.