In “Innovation”, after “If a District understands an Innovation but no longer understands a different Innovation which is listed as one of its prerequisites, then the understood Innovation’s effect no longer applies to that District until it regains all of the understood Innovation’s prerequisite Innovations.”, add:-

While a District’s People is zero, the effects of Societal Innovations do not apply to that District. While a District’s Energy Trap is zero, the effects of Technological Innovations do not apply to that District.