The requirements for contractors are (known as the ABC test)[0][1]:
1) Part A of the test requires that the worker is free from the control and direction of the hiring entity in connection with the performance of the work, both under the contract for the performance of the work and in fact; and
2) Part B of the test requires that the worker performs work that is outside the usual course of the hiring entity’s business; and
3) Part C of the test requires that the worker is customarily engaged in an independently established trade, occupation, or business of the same nature as the work performed.
4) The contractor must actually be in business for themselves.
1) Part A of the test requires that the worker is free from the control and direction of the hiring entity in connection with the performance of the work, both under the contract for the performance of the work and in fact; and
2) Part B of the test requires that the worker performs work that is outside the usual course of the hiring entity’s business; and
3) Part C of the test requires that the worker is customarily engaged in an independently established trade, occupation, or business of the same nature as the work performed.
4) The contractor must actually be in business for themselves.
[0] - https://www.californiaemploymentlawreport.com/2019/03/unders...
[1] - https://www.dir.ca.gov/dlse/faq_independentcontractor.htm