ومن حكم هذا النوع: أن وجوب الفعل فيه لا ينافي وجوب فعل آخر فيه من جنسه.
The obligation of an act during this type of period does not exclude another obligatory act of the same kind within it.
The ẓuhr prayer period can accommodate other prayer obligations, including a separate vow or a make-up prayer where applicable. Fulfilling one does not automatically discharge another.
For example, a vow to perform additional units during the ẓuhr period does not become impossible merely because the obligatory ẓuhr prayer also belongs to that time. The acts have distinguishable legal grounds and intentions.
Principle: a capacious time interval may contain several legally valid acts while their distinct obligations remain separate.