A magistrate must enter into an original search warrant the contents of a proposed duplicate original that are read to the magistrate. ☐ There's no Texas case law, but other state and federal courts allow them, so why not us?A sworn affidavit setting forth substantial facts establishing probable cause shall be filed in every instance in which a search warrant is requested. What types of searches and seizures are prohibited under the Fourth Amendment, and when may exceptions to the warrant requirement apply? Criteria for a Valid Search Warrant Under the Fourth Amendment. The arrest warrant: See TMCEC 2022 Forms Book: Warrant of Arrest: Magistrate. The warrant must be based on probable cause. This is known as the "warrant requirement. Acts 1965, 59th Leg. Texas has its own version of the Fourth Amendment.