Elders in community say full shaving of head is not allowed for those with living father (parents). Only at the death of the father the head is full shaved and after that one can shave any time.
Here full head shave I mean without tuft (Shikha). At chudakarma, upanayana or brahmacharya days head is shaved but tuft is left. But clean shave not allowed.
Any references in scriptures why this is not allowed, or any references which prescribes clean head shave at death of parent?
Note: question is not about shaving head at temples like Tirupati (even that is not allowed in my community; we have to keep the tuft). Also, question is not about Chudakarma.