Circadian study : estimating "local timezone"

We have need to estimate the subject's "local timezone" so as to assess physiologic disruptions when they are out of circadian cycle due to frequent travel.


To our knowledge, we have to collect location apart from the HealthKit framework.


Question : When presenting the subject with discloures via ResearchKit -- of what HealthKit information will be collected for the medical study -- should the disclosure alerting the end-user to our need to track their location be presented in a separate screen, or bundled with the HealthKit information access?