Girls before Puberty sets in are allowed, and women above 40 who are post Menopause are eligible to do the pilgrimage.
These things are taught in every conservative hindu households, a Man should wake up on right side and step on the ground with right foot, for a woman it is the left side,
Likewise, when you touch someones feet there is a specific way you do it for Gurus and differently for elders and others.
Males are not allowed to wear shirt in Temples in South India, They have to go bare chested, since the abode of the lord is in the Heart and in the chest, so the chest should be well exposed to receive the blessings of health.
These laws can be seen in Sri Kalahasti and other olden temples.
There are many such things ,which todays people dont know about traditions,culture and the correct way of doing things, since they live in nuclear families where there is no one to guide them in the Do's and Dont's of Hinduism.