SB12-067 requires that only nonprofits can charter. This could either be a founding board that has incorporated in order to start a new charter school or a charter management organization (CMO). CMOs are generally defined as nonprofit, differentiating themselves from for-profit, education management organizations or EMOs.
There are currently CMOs that have chartered directly with an authorizer in Colorado. While it's permissible for a CMO to hold individual charters, it's also possible for a CMO to oversee independent governing boards that hold the charter. There is no predetermined structure that's best. It's totally up to the authorizer and the charter school applicant.
SB 067 grandfathers in schools established before August 6, 1997 to accommodate charter schools that never incorporated and therefore became nonprofits. Some of the earlier charter schools considered themselves a public school and therefore getting separate nonprofit status was redundant. There has been differing legal opinions about this over the years. In recent years almost all of the newly established charter schools became nonprofits. In fact, the state Charter School Institute law requires nonprofit status for its schools.