The ethics and accuracy standard
We already have a legal structure in place for punishing companies that use false advertising. They can be fined or even tried in criminal court. My idea is to pass a law using these preexisting precedents to make govornment officials follow the same rules.
If a statement is made by a politician (regardless of party) which the facts checkers deem false. He/she has a 72 hour period to make a public detraction. If they fail to make this statement in the allotted time then civil and potentially criminal charges should follow. Politicians are either promoting themselves or their party and their statements are refections on both. I believe that this is tantamount to advertising. And so therefore could be enforced under the same provisions.