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Dear Teachers,
Is what i wrote correct grammatically in the following message :

According to the issuance of a new regulation by Port Authority prohibiting crew change activities (signing on and off) and parcel delivery these regulations implemented as of yesterday for this reason he might not be able to board the vessel.

Thanks

[Tdol]

It's a bit strained. How about this:
Due to the issuance of a new regulation by the Port Authority prohibiting crew change activities (signing on and off) and parcel delivery, which was implemented as of yesterday, he might not be able to board the vessel.