konchokzopa wrote:if you have broken your vow's you have to receive them again from someone from the lineage or the sangha.
This kind of vow-talk is a Tibetan way of conceiving the precepts, based, I believe, on the Sarvāstivādin Abhidharma. The Theravāda doesn't conceive of the precepts (sikkhāpada; śikṣāpada) as mysterious meme-like entities that are somehow preserved in lineages and which a person can be said to "have taken" or "to be keeping" only if they've been magically transmitted to him by a suitably qualified "lineage-holder".
In the Theravādin conception you can resolve to undertake the precepts all by yourself. And if you break one then you can re-take it all by yourself, by recognising the fault and resolving to exercise greater restraint in future.