Each company shall notify the department of any transfer of title, use or occupancy of operating property consisting of real property, whether such transfer is to or from such company. Such notification shall contain the legal description of the property, date of transfer, and name and address of transferor and transferee. For purposes of this rule, it shall be sufficient to transmit a copy of the deed, real estate contract, or lease (as the case may be) to the department. Such notification shall be made within ninety days of the effective date of such transfer.