To limit the probability that structures with a Discontinuity in Capacity - Weak Storey (irregularity Type 6 in Table 4.1.8.6.), which are particularly vulnerable to damage and collapse during seismic ground motions, will be built in areas other than low seismicity regions, which could lead to structural failure, which could lead to harm to persons.
To limit the probability that, when built in low seismicity regions, such structural systems will not remain elastic when subjected to the design ground motion, which could lead to structural failure, which could lead to harm to persons.