2010 California Code
Civil Code
Article 5. Delegation Of Agency

2349.  An agent, unless specially forbidden by his principal to do
so, can delegate his powers to another person in any of the following
cases, and in no others:
   1. When the act to be done is purely mechanical;
   2. When it is such as the agent cannot himself, and the sub-agent
can lawfully perform;
   3. When it is the usage of the place to delegate such powers; or,
   4. When such delegation is specially authorized by the principal.



2350.  If an agent employs a sub-agent without authority, the former
is a principal and the latter his agent, and the principal of the
former has no connection with the latter.



2351.  A sub-agent, lawfully appointed, represents the principal in
like manner with the original agent; and the original agent is not
responsible to third persons for the acts of the sub-agent.