帮助翻译一个授权书

Company A hereby authorize Mr.B to negotiate with Person C(Company) for the pp matters that relative to the cooperation and clause of the contract and report the content to Company A.For the content of the cooperation clause ,it could not be operative until the approval and final confirmation by signature of A company.The validity of this letter of authorization is commence from the arrival of this letter of authorization to the day of the signature of the contract between the two Parties.

A Corporation is authorized Mr B, with the C organization discussed ppthe cooperation matters concerned as well as the contract provision,and discussed the content notifies as necessary to A Corporation.
A Corporation and the C organization about the pp article ofpartnership content, must verify after A Corporation, finallyconfirmed signs for.
The authorized deadline delivers the date from this power of attorney,until both sides cooperate the agreement officially to sign the date