To limit the probability that the calculation of wind effects on the building structure will not take into account how the properties of the building structure affect dynamic amplification, which could lead to structural failure, which could lead to harm to persons.
To limit the probability of the implementation of unacceptable design methodologies for the calculation of dynamic amplification due to wind, which could lead to structural failure, which could lead to harm to persons.
To exempt certain buildings from the application of Sentence 4.1.7.2.(1), which would otherwise classify buildings as not dynamically sensitive, if certain conditions are met.