A. Any public agency or public utility having lawful authority to occupy the highways and which is authorized by law to establish or maintain any works or facilities in, under or over any public highway;

B. Work performed by or on behalf of the owner of any single-family residence where the work to be performed is appurtenant to such single-family residence, but such owner shall be subject to all other obligations and liabilities of this chapter;

C. Work performed pursuant to and in accordance with an agreement for public construction in connection with development of real property.