As important as it is for parents to exercise their moral authority in assisting the youth not to make unwise decisions, it is also incumbent on the parents as Bahá’ís to give due consideration to the significance of the spiritual impact of the Faith upon the youth and recognize that the youth must have some latitude to respond to the stirring of their hearts and souls, since they, beginning at the age of 15, must assume serious spiritual obligations and duties and are themselves alone ultimately responsible to God for the progress of their own souls. The capacity for mature thinking on the part of youth differs from one to the other and according to age; some attain this ability earlier than others; for some it is delayed. Parents are generally in a position to judge these matters more accurately than others and must consider them in their attempt to guide the youth in their families, but the parents must strive to do so in such a way as not to stifle their children’s sense of spiritual responsibility.
(The Universal House of Justice, 1992 Oct 28, Manner of Appealing to Youth)
It matters not whether they mature later in one country than in another. The command of Bahá’u’lláh is universal, irrespective of any variance in the age of maturity in different countries and among different peoples.
(Shoghi Effendi, Lights of Guidance, p. 233)
The importance of attaining spiritual maturity at the age of fifteen is that it marks that point in life at which the believer takes firmly into his own hands the responsibility for his spiritual destiny.
(Universal House of Justice, Messages of the Universal House of Justice, 426.2)
Up to the age of 15 years, children are under the direction of their parents.
(Universal House of Justice, Lights of Guidance, p. 154)