Independent Contractor Agreement Therapist

Is it appropriate for a private practice that wants me to engage with them as an independent subcontractor to tell me to put it on my liability insurance coverage? Is it normal for a single contract therapist to also pay rent to the agency? For example, if a rent of $ 600 / mo is paid to the agency for offices, as well as a 70/30 division. Since a written agreement can help justify independent contracting status, CAMFT has drafted a model agreement for independent contractors for the provision of professional services. . . .