48 CFR §1837.110-70

1. (a)The contracting officer shall insert the clause at 1852.237-70, Emergency Evacuation Procedures, in solicitations and contracts for on-site support services where emergency evacuations of the NASA installation may occur, e.g., snow, hurricanes, tornadoes, earthquakes, or other emergencies.
2. (b)The contracting officer shall insert the clause at 1852.237-71, Pension Portability, in solicitations, contracts or negotiated contract modifications for additional work when the procurement officer makes the determination in 1837.170(a)(2).