The owner of an antenna structure for which an Antenna Structure Registration Number has been obtained must notify the Commission within 5 days of completion of construction by filing FCC Form 854-R and/or dismantlement by filing FCC Form 854. The owner must also notify the Commission within 5 days of any change in structure height or change in ownership information by filing FCC Form 854. FCC Forms 854 and 854-R, and all related amendments, modifications, and attachments, shall be filed electronically.