Final answer:
The maximum extension period for a concurrent/regular report depends on the organization's reporting guidelines and policies.
Step-by-step explanation:
The question is asking about the maximum extension period for a concurrent/regular report. A concurrent/regular report is a type of report in business that is submitted by an employee to both their regular reporting senior and their concurrent reporting senior. The maximum extension period can vary depending on the reporting guidelines and policies of the organization. Without specific information about the reporting guidelines or policies, it is impossible to provide a definitive answer. It is best to consult the organization's reporting guidelines or speak with a supervisor for accurate information.