Which type of subdivision must be registered with the Colorado Real Estate Commission?

The correct answer highlights that a co-op building with 60 units requires registration with the Colorado Real Estate Commission because it falls under specific regulatory provisions aimed at protecting consumers in real estate transactions. Such registrations ensure transparency and compliance with state laws, particularly when it involves multiple units or ownership structures like cooperatives. This type of arrangement typically necessitates oversight to safeguard the interests of individuals who may purchase shares in the co-op and rely on the regulatory body for guidance on proper operational standards and financial practices within the cooperative living community.

In contrast, the other options do not necessitate the same level of oversight or registration with the Real Estate Commission. Commercial buildings might require different forms of compliance, but they often do not fall under the residential real estate regulations that govern subdivisions. Membership campgrounds, while they have their own set of regulations, also do not require the same registration unless they are structured like a condominium or cooperative. Lastly, a bulk sale involving multiple developers typically pertains more to business transactions than to consumer protection regulations, making it exempt from the need for registration with the commission.