We have to always keep in mind that in respect of any karma, dharma SAstras provide for multiple options .
According to Manu, a BrAhmaNa who is desirous of brahmavarcas can be performed Upanayanam at the age of five.
brahmavarcasa kAmasya kAryam viprasya pancame !
--- Manu
According to Angiras, a BrAhmaNa who is desirous of brahmaVarcas can be performed Upanayanam at the age of five.
brahmavarcasa kAmasya pancame abde agrajanmanah !!
--- Angiras
According to Manu, a BrAhmaNa who is desirous of brahmavarcas can be performed Upanayanam at the age of five.
brahmavarcasa kAmasya kAryam viprasya pancame !
--- Manu
According to Angiras, a BrAhmaNa who is desirous of brahmaVarcas can be performed Upanayanam at the age of five.
brahmavarcasa kAmasya pancame abde agrajanmanah !!
--- Angiras