I know the state government is in charge of their EMS scope of practice, but given the NREMT is based in Ohio... well, I don't know, I would have thought they'd go by NREMT guidelines.
IIRC, South Carolina's SOP also includes intubation for EMT-Basics.
In general, I'm against training EMT-Basics to intubate. Given the wealth of data on how inconsistent EMT-Paramedics are at successfully intubating in the field, expanding the practice to providers with even less training seems like a bad idea--especially in cardiac arrest, where intubation is getting de-emphasized for all providers. I think it would be more productive to train Basics how to use an LMA or combitube device for "advanced airway," and teach something like IM injections or IV access if you want to do something more. This would put you at the "Advanced EMT" level under the new national SOP's.