§97.215 has rules for "model craft". It says a station may be operated under those rules. To me, the intent of those rules is to allow for control of RC models without a break to identify every 10 minutes. I'd guess for a rover designed for Mars, a brief identification break is not a problem.
However, the rover is a station, and there won't be anyone at it. I'd think §97.213 Telecommand of an amateur station would allow operation in that case:
An amateur station on or within 50 km of the Earth's surface may be under telecommand where:
(a) There is a radio or wireline control link between the control point and the station sufficient for the control operator to perform his/her duties. If radio, the control link must use an auxiliary station. A control link using a fiber optic cable or another telecommunication service is considered wireline.
(b) Provisions are incorporated to limit transmission by the station to a period of no more than 3 minutes in the event of malfunction in the control link.
(c) The station is protected against making, willfully or negligently, unauthorized transmissions.
(d) A photocopy of the station license and a label with the name, address, and telephone number of the station licensee and at least one designated control operator is posted in a conspicuous place at the station location.
So the salient points seem to be:
- Tape a license and contact information on the rover
- Put a 3-minute transmit timeout on the rover
- The controlling station must be an auxiliary station (which, among other things, limits you to VHF and higher frequencies)