2010 California Code
Civil Code
Article 1. Who Is Entitled To Lien

8400.  A person that provides work authorized for a work of
improvement, including, but not limited to, the following persons,
has a lien right under this chapter:
   (a) Direct contractor.
   (b) Subcontractor.
   (c) Material supplier.
   (d) Equipment lessor.
   (e) Laborer.
   (f) Design professional.


8402.  A person that provides work authorized for a site improvement
has a lien right under this chapter.



8404.  Work is authorized for a work of improvement or for a site
improvement in any of the following circumstances:
   (a) It is provided at the request of or agreed to by the owner.
   (b) It is provided or authorized by a direct contractor,
subcontractor, architect, project manager, or other person having
charge of all or part of the work of improvement or site improvement.