Final answer:
The requirement for providing the 'Commercial Property Owner's Guide to Earthquake Safety' comes from earthquake safety regulations and varies by jurisdiction. No specific date is provided since it depends on local laws. The question regarding the number of residents needed to be surveyed for earthquake supplies would depend on statistical data regarding Californians' earthquake preparedness.
Step-by-step explanation:
The Commercial Property Owner's Guide to Earthquake Safety is typically required for commercial properties built prior to a certain date. This requirement originates from concerns around seismic safety, especially in earthquake-prone areas like California. Prior to the Alquist-Priolo Earthquake Fault Zoning Act or the Seismic Hazards Mapping Act, buildings may not have been constructed considering modern earthquake standards, and owners of these buildings must provide this booklet to prospective buyers. The exact date is specific to regulations that may vary by jurisdiction and can be found in local building codes or the Natural Hazards Disclosure Act requirements. We do not provide the exact year here, as it depends on the jurisdiction in question and the latest legal requirements.
As for the expected number of California residents one would have to survey to find one without adequate earthquake supplies, this would depend on the current statistics regarding earthquake preparedness among Californians. Local opinions and surveys conducted by organizations focused on emergency preparedness can provide insight into these statistics. Similarly, to find a resident with adequate earthquake supplies would also require surveys and data analysis. The percentage of residents with and without adequate supplies would define the average 'sample size' needed to find one of each.