The shareholders or beneficiaries of a real estate investment trust shall not, as such, be personally liable for any of its obligations arising after the effective date of this Act, nor shall persons who become shareholders or beneficiaries after the effective date of this Act be personally liable, as such, for obligations of the real estate trust. If an application for registration of the securities issued or issuable by such unincorporated trust or association has been registered by the Secretary of State pursuant to Section 5 of the Illinois Securities Law of 1953, such registration shall be conclusive evidence that an unincorporated trust or association is a real estate investment trust as to all persons who become shareholders or beneficiaries after the registration date and prior to its suspension or revocation, if any, and as to all obligations of the unincorporated trust or association arising after the effective date of this Act whether they arose before or after the effective date of registration under Section 5 of the Illinois Securities Law of 1953, and prior to suspension or revocation of the registration.