This summary is not the rule. The rule text controls.
When a lawyer speaks to a lawmaking body or a government agency on behalf of a client, but the situation isn't a courtroom trial or hearing, the lawyer still has to follow certain basic honesty rules. First, the lawyer must clearly say they are there representing someone else, not speaking for themselves. This way, the lawmakers or officials know the lawyer has a client's interests in mind.
The lawyer also has to be honest and fair, similar to how they'd act in court. They can't lie to the legislative body or agency, can't hide important information they're required to share, and can't try to mislead anyone. They also can't destroy evidence, ask a client to hide or lose evidence, or take other unfair actions to help their case.
Finally, the lawyer has to treat everyone involved with respect. They can't try to improperly influence the people making decisions, such as through bribery or backdoor deals. This rule makes sure that even outside a courtroom, lawyers act honestly and fairly when they're speaking or acting on behalf of a client in front of government decision makers.