Cite as 290 Ark. 100 (1986)
P.2d 1354 (1976), where the court analyzed in depth its rulemaking power.
[6] In 1971 the Arkansas legislature used mandatory words in committing the regulation of criminal practice and procedure to this court:
The Supreme Court of the state of Arkansas shall have the power to prescribe, from time to time, rules of pleading, practice, and procedure with respect to any or all proceedings in criminal cases.
Ark. Stat. Ann. § 22-242 (Supp. 1985). That action was not an improper delegation of legislative power; it merely recognized the court's inherent power. Miller v. State, 262 Ark. 223, 555 S.W.2d 563 (1977). The statutory language quoted above was repeated in a 1973 statute by which the legislature recognized the Supreme Court's power to prescribe rules with respect to procedure in civil cases. § 22-245. Under those statutes we have adopted the Rules of Criminal Procedure and the Rules of Civil Procedure. More recently we adopted rules for the certification of court reporters. We are not the first court to adopt the Uniform Rules of Evidence by judicial action. That step has been taken not only in New Mexico, as mentioned earlier, but also in Florida, In re Florida Evidence Code, 372 So.2d 1369 (1979); in Montana, Montana Rules of Evidence, Ch. 10, Mont. Code Ann. (1984); and in Wisconsin, In re Promulgation of Rules of Evidence, 59 Wis. 2d R1-R377 (1973). The Supreme Court of the United States adopted the Federal Rules of Evidence pursuant to federal statutes quite similar to the 1971 and 1973 statutes enacted in Arkansas. See Reporter's Note, 409 U.S. 1132 (1972).
[7] Even though our order formally adopting the Uniform Rules is effective today, Ricarte is entitled to a new trial, for his wife should not have been allowed to testify for the State. Since the invalidity of the statute adopting the Rules was properly raised at the trial, Mrs. Ricarte's right to claim the statutory privilege must in fairness be recognized at a new trial.
[8, 9] A second argument is that the court should have granted a mistrial when the prosecutor said in his opening statement that Ricarte had been in the penitentiary and also when a witness made that statement. The evidence was relevant,
