That statement is saying if you have been living in California for more than a year and over 18, you should have already established California residency by meeting the California residency requirements. There is no need to use the Condit bill.
If you have lived in California for more than a year and did not satisfactorily meet the conditions for residency listed by the Condit Bill and California residency, then you will be classified as a non-resident since the year is conditional.
This exemption expires after one full year. To maintain a residence classification once the exemption expires, you must have satisfied the “Physical Presence” and “Intent to Remain in California” requirements to establish your own residency during that year.