SHAFAQNA – The Grand Ayatollah Shobairi Zanjani answered a question about fasting for girls who newly reached the age of adulthood.
Question: The necessity of fasting for a girl who newly reached the age of adulthood; is it up to her or her guardian to recognize this?
The Grand Ayatollah Shobairi: As long as the fear of harm for her emerges even by others saying so, is enough. If she cannot recognize her own gain and loss, the criterion is her guardian’s (father or paternal grandfather) opinion.
Source: PERSIAN SHAFAQNA