At a minimum, the existence of a contract would serve as an authorization check; without a valid contract, the service cannot be invoked.

最低限度，合同的存在将起到授权核查的作用；如果没有有效的合同，将不能调用服务。

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XIII. The contract shall go into force after the signature of both parties. Alteration or signature without written authorization is invalid.

本合同自甲、乙双方签字或盖章之日起生效，涂改或未经书面授权代签无效。

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And the licensee of a common licensing contract may lodge a lawsuit upon explicit authorization of the owner of the variety.

普通实施许可合同的被许可人经品种权人明确授权，可以提起诉讼。

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This move clearly indicates that the risk-reward balance for leveraging cloud computing for public websites for DHS is favorable when using the GSA IaaS BPA. Providers under this contract are required to comply with the yet to be finalized, Federal Risk and Authorization Management Program (FedRAMP).

FORBES: Homeland Security Moves To Cloud through GSA IaaS BPA