Which of the following can result in revocation of the station license or suspension of the operator license?

The correct choice relates to the responsibility of amateur operators to maintain accurate contact information with the FCC. Providing and maintaining a correct email address is essential for communication purposes. If an operator fails to keep their email address updated, it can impede the FCC's ability to contact them regarding any important matters, such as license issues or regulatory changes. This lack of communication can lead to significant misunderstandings and violations of regulations, ultimately resulting in potential revocation of the station license or the suspension of the operator's license.

Other options involve responsibilities that might lead to penalties but do not necessarily lead to revocation or suspension. For example, failing to inform the FCC of any changes following an RF safety evaluation typically results in warnings or fines rather than mandatory revocation. Similarly, not obtaining FCC type acceptance for home-built transmitters could result in penalties but wouldn’t inherently place the operator’s license at risk if the devices are otherwise operated in compliance with regulations. Lastly, while it is important to have a copy of your license available, failing to do so is less likely to directly result in severe penalties like revocation compared to lapses in communication with the FCC.