They absolutely preempt!
"A statute does not trump the Constitution."
People v. Ortiz, (1995) 32 Cal.App.4th at p. 292, fn. 2
Conway v. Pasadena Humane Society (1996) 45 Cal.App.4th 163
A statutory privilege cannot override a defendant's constitutional
right. People v. Reber, (1986) 177 Cal.App.3d. 523 [223 Cal.Rptr.
139}; Vela v. Superior Ct, 208 Cal.App.3d. 141 [255 Cal.Rptr. 921],
however, "the judiciary has a solemn obligation to insure that the
constitutional right of an accused to a fair trial is realized. If
that right would be thwarted by enforcement of a statute, the state
Vela v. Superior Ct., 208 Cal.App.3d. 141 [255 Cal.Rptr. 921
Obviously, administrative agencies, like police officers must obey
the Constitution and may not deprive persons of constitutional rights.
Southern Pac. Transportation Co. v. Public Utilities Com., 18 Cal.3d 308
[S.F. No. 23217. Supreme Court of California. November 23, 1976.]