Answer:
The research must pose no more than minimal risk.
Explanation:
The waiver of parental permission is related to the reasonable requirements to preserve the field of study. It involves research with minimal risk, surveys, etc. The research on sensitive topics requires a waiver and that is to ensure the accessibility of teens to limited research topics with minimal risk. As per the question, the requirements that must be met before an IRB could waive parental permission to the research is that it must pose no risk more than 'minimal risk'. This is done to prevent the inclusion of high risk among the students. Thus, in order to seek a waiver of parental permission, it is necessary to ensure minimal risk.