(New Mexico will require that 43% of vehicles sold by 2026 be electric)
They can declare it but what if the Public says NO! Car dealers in Amarillo, Lubbock and El Paso will be glad to fill the bill for those wanting non electric vehicles.
The other part of the rule says gasoline cars sold must have California type emissions controls to be registered in New Mexico. That leads to no sales or an attempt to keep it registered in TX and not be caught avoiding NM registration. Not too much of a problem here in SE as many work vehicles have TX plates right now and are registered with companies headquartered in TX.
BTW, there is a way, for a hefty price, for newer diesel P/Us out of Warranty to go across the state line into Texas and have the current emissions control system (the one that requires adding Blue DEF every several hundred miles) removed and replaced with an older system that improves operation and mileage.