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## Forty-First Chapter
**311** The remaining rules have been stated earlier. One should follow them completely. As long as he is studying, he should observe celibacy. ||164||
Now, I will describe his vow-observance in order. This will be a summary of the chapter on the Upasaka. ||165||
For a boy who has received the sacred thread, there are four types of marks to be worn: a mark on the head, a mark on the chest (the sacred thread), a mark on the waist (the muñja cord), and a mark on the lower body (a white dhoti). These have been decided earlier. ||166||
He should wear the sacred thread if he earns his livelihood through weapons, writing, agriculture, or trade, like the other worthy twice-born. ||167||
If a man's family has been tainted for some reason, and he has purified it with the consent of the king and others, then there is no prohibition against his sons, grandsons, and descendants receiving the sacred thread, if his ancestors were worthy of initiation. ||168-169||
Those born into a family unworthy of initiation, who earn their livelihood through arts and crafts like dancing and singing, are not allowed the sacred thread or other rites. ||170||
For them, it is appropriate to wear a single dhoti, as long as they observe their vows, until they renounce the world. ||171||
Those who wear the sacred thread should eat meatless food, observe the vow of marital fidelity, renounce intentional killing, and abstain from forbidden food and drink. ||172||
Thus, the complete rules of vow-observance for a twice-born who has adopted a pure and virtuous life, purified by vows, are understood. ||173||
The Upasaka Sutra mentions ten rules for them. We will now describe them in order, briefly. ||174||
One should enter the homes of those in his own caste and beg for alms, and whatever wealth he receives, he should respectfully offer it to his teacher. ||163||