The failure of the passenger to produce the passenger ticket, or the irregularity or loss of the passenger ticket does not affect the existence or validity of the contract of transport.

旅客未能出示客票、客票不符合规定或者客票遗失，不影响运输合同的存在或者有效。

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This text has decided to research the first problem , namely the validity of the contract.

本文选择了第一个问题进行研究，即合同是否有效的问题。

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That the transferor is entitled to dispose his water rights is a part of the precondition for the transfer, otherwise the validity of the contract shall be pending.

转让人享有能够处分的水权是转让的条件之一，否则转让合同的效力待定。

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