(b) On the day this chapter becomes applicable to any county, any utility engaged in the operation or construction of a system shall be entitled to receive a certificate for the area served by such utility on the day this chapter becomes applicable to it. Within 90 days after the day this chapter becomes applicable to it, the utility shall make application for a certificate by filing with the commission:
1. A map of its existing system or system under construction;
2. A description of the area served by the system; and
3. A tariff listing all rates and charges and such other financial information as may be required by the commission.
Such application shall be accompanied by a fee as provided by s. 367.145. If a utility fails to register with the commission within the prescribed time, the commission may require that the utility apply for an original certificate of authorization in accordance with s. 367.045.