At what age does a female child assume the legal status of a woman regarding burial shrouding?

Primary text

There is a report from Ahmad, followed by the majority of his companions, that a female child who reaches the age of nine is treated as a woman regarding her burial shroud. The evidence cited is the hadith of Aisha that the Prophet (peace be upon him) entered upon her when she was nine years old. Aisha herself is reported to have stated that when a girl reaches nine, she is considered a woman.