How to use "official" in a sentence

I take the official oath today with no mental reservations, and with no purpose to construe the Constitution or laws by any hypercritical rules

And while I do not choose now to specify particular acts of Congress as proper to be enforced, I do suggest that it will be much safer for all, both in official and private stations, to conform to and abide by all those acts which stand un repealed, than to violate any of them, trusting to find impunity in having them held to be unconstitutional.

"Because your son is still seventeen, we need your official agreement, please."

"Remember maybe ten years ago when that Texas elections official revealed how Lyndon Johnson's first local election was fixed? The guy said he was just trying to clear his conscience after all those years

Kennebeck's bosses want to stop us before we sow any seeds of doubt about the official explanation

What reason does she have to doubt the official story of her son's death?

Does she have any proof that the official story of her son's death is false?

Christina Evans probably hadn't entertained a single doubt about the official explanation of the Sierra accident; she probably hadn't known a damned thing about Pandora when she had requested an exhumation, but her timing couldn't have been worse.

Earlier this morning it had occurred to Elliot that he and Tina were the only people who knew that the official story of the Sierras accident was a lie