JAC is on point. The clue is that the Chieftain article referred to the "charitable registrar." NM has a Charitable Solicitations Act (NMSA 57-22-1, et al) requiring "charitable organizations" to register with the AG's office. Under the act a "charitable organization" is defined as an entity that has been granted exemption by the IRS from federal income tax under section 501(C)3. Once CTSMC is granted the exemption it would register. That's what RGRPC did.
Now who do you suppose would know enough about NM laws and be clever enough to take advantage of the limited experience of the Antonito stringer for the Pueblo paper?