To execute a search warrant a peace officer may break open the door the or window of any house if, after giving notice of his authority and purpose, he is refused admittance. NOTE: Section 35.30 is substantively the same as former § 1531. See also Cal. Pen. Code § 1531. See generally 8A Moore, Federal Practice &41.06[1] (discussion of identical requirement of announcement). Compare § 20.50 (same requirements for entry to make arrest).