When a requirement has nested requirements, all the nested requirements apply as part of the container requirement. Deleting the container requirement deleted [deletes] the nested requirements, a functionality inherited from UML. Source OMG Systems Modeling Language (SysML) 1.6
Subrequirements shall be accessed through the "nestedClassifier" property of a class. Source OMG Systems Modeling Language (SysML) 1.6
The default interpretation of a compound requirement, unless stated differently by the compound requirement itself, is that all its subrequirements shall be satisfied for the compound requirement to be satisfied. Source OMG Systems Modeling Language (SysML) 1.6
