Batboard

Need some info regrading radio use in Mexico. Im sending some radios to use in my family's ranch in Sept. Looking to send some HT1000's or HT750's. DOnt want to get them in trouble, so would like to know if anyone knows about what kind of freq i can use. I now frs radios are ok but are held to the same specs as to the like the power output etc.

Sending HT's due to being rugged.