CFR › Title 14 › Part 450 › §450.123 14 CFR §450.123 (a) General. A flight safety analysis must account for the distribution of people for the entire region where there is a significant probability of impact of hazardous debris. (b) Constraints. The exposure analysis must— (1) Characterize the distribution of people both geographically and temporally; (2) Account for the distribution of people among structures and vehicle types; (3) Use reliable, accurate, and timely source data; and (4) Account for vulnerability of people to hazardous debris effects. (c) Application requirements. An applicant must submit: (1) A description of the methods used to develop the exposure input data in accordance with § 450.115 (c), and (2) Complete population exposure data, in tabular form.