Opinion of the Court
QuiNN, Chief Judge:This appeal raises two questions as to the propriety of the trial proceedings. The first deals with the excuse of a court member by the convening authority from further participation in the trial; the second is concerned with the right of the convening authority to reverse a court ruling which dismissed the charge on the ground the accused had been denied a speedy trial.1
Appearing before a special court-martial convened at Subic Bay, Republic of the Philippines, the accused moved to dismiss the charge of larceny referred to the court for trial on the ground he had been deprived of a speedy trial. The motion was granted. Several weeks later, the court reconvened on direction of the convening authority. He had reversed the court’s ruling because, in his opinion, the evidence presented on the motion to dismiss demonstrated the Government had proceeded “with reasonable diligence,” and without oppression of, or prejudice to, the accused. As a result, he ordered the court to proceed with the trial, with leave to reconsider the motion on additional evidence. Defense counsel renewed the motion to dismiss; this time it was denied. However, the trial did not continue. With the concurrence of Government counsel, the accused moved for a mistrial because counsel and the court members had discussed the case during the intervening period.
The charge was referred to another special court-martial, none of whose members had sat on the previous court. Trial counsel and defense counsel were the same. Both were qualified lawyers. The proceedings moved through the usual preliminaries to the point where counsel waived the reading of the charge. Manual for Courts-Martial, United States, 1951, Appendix 8a. What followed is set out below:
“TC: With the consent of the accused and permission from the court, I shall omit the reading of the charge, a copy of which is before each member of the court and the accused. The charge is signed by YN3 J. A. Gary, USN, a person subject to the code, as accuser; is properly sworn to before an officer of the armed forces authorized to administer oaths; and is properly referred to this court for trial by Lewis K. Worthing, Captain, U. S. Navy, Commanding Officer, U. S. Naval Station, Subic Bay, Philippines, the convening authority. (The Charge Sheet follows this page)
“Does the accused consent?
“DC: The accused consents.
“PRES: The reading of the charge may be omitted. The original of the charge sheet will be in*532serted in the record of trial at this point.
“TC: The charge was served on the accused by William F. Cole, Lieutenant Commander, U. S. Navy, for the trial counsel, on 31 October 1966. Before receiving your pleas, Boehm, I advise you that any motion to dismiss the charge or to grant other relief should be made at this time.
“DC: The defense has two motions to make at this time. It’s first motion is a motion to dismiss for lack of a speedy trial.”
The defense motion to dismiss was denied. Defense counsel then moved for a continuance, and this motion was granted. When court reconvened, the following transpired:
“TC: Let the record show that all parties who were present when the court recessed are again present.
“PRES: We’ll have to make a correction on that, Mr. Carriere.
“TC: I beg your pardon, with the exception of Lieutenant (jg) Murray who has been excused with the expressed consent of the convening authority.
“PRES: Has the defense any objection to proceeding with the court as now constituted?
“DC: No, sir.
“PRES: I would like to remind the members of the court, counsel, and the reporter that they remain under their original oaths. At the time that this court granted the continuance on the motion of the defense, we had proceeded almost to the arraignment of the accused and prior to receiving the plea of the accused, it was the option of the defense to make any motions. I ask you now, do you have any motions to make or are you ready to proceed ?
“DC: The defense at this point has an additional motion to make.”
With the completion of these proceedings, the trial progressed in regular order to conviction and sentence.
Since a favorable ruling on the accused’s contention that the convening authority lacked power to reverse the court-martial ruling granting his motion to dismiss will obviate consideration of the correctness of proceedings at the second trial, we turn first to that question.
Trial rulings are subject to review by a convening authority only as provided in the Uniform Code of Military Justice. United States v Knudson, 4 USCMA 587, 16 CMR 161. The specific situation presented by this case is governed by Article 62 (a), Code, supra, 10 USC § 862. It provides as follows:
“If a specification before a court-martial has been dismissed on motion and the ruling does not amount to a finding of not guilty, the convening authority may return the record to the court for reconsideration of the ruling and any further appropriate action.”
The Article gives the Government the right to obtain review of a trial ruling which disposes of a charge on a ground other than one absolving the accused of guilt. In this regard, the Article is like 18 USC §3731, which authorizes an appeal in a criminal case by the Government to either the Supreme Court of the United States or the Court of Appeals, depending upon the nature of the judgment of dismissal.
Appellate defense counsel acknowledge the general applicability of the Article to motions constituting a plea in bar, such as a motion based on alleged expiration of the statute of limitations, but they contend it does not extend to a motion to dismiss for lack of speedy trial. The contention has two aspects. The first is that the Article is merely a restatement of the practice before the Uniform Code, which did not include a motion of the kind in issue; the second is that the grant of a motion to dismiss for denial of a speedy trial “amounts to a judgment of acquittal” from which there is no right of review.
Appellate defense counsel contend *533that the court-martial practice before the Uniform Code of Military Justice specifically prohibited a motion to dismiss for lack of speedy trial. Support for this view is sought in the provision in the Manual for Courts-Martial, U. S. Army, 1949, to the effect that an objection by an accused “that owing to the long delay in bringing him to trial he is unable to disprove the charge or to defend himself” is not a proper subject “for motion prior to plea, however much . [it] may constitute ground for a continuance.” Id., paragraph 64 g, at pages 60, 61. It may be doubted that this provision prohibited a motion to dismiss for lack of speedy trial. The language of the provision can be construed as indicating the settled rule that delay alone does not necessarily constitute denial of a speedy trial, especially if the delay is occasioned by the accused. See United States v Hounshell, 7 USCMA 3, 6-7, 21 CMR 129; Fleming v United States, 378 F2d 502 (CA 1st Cir) (1967); cf. United States v Shelton, 211 F Supp 869 (DC DC) (1962). Also, several cases indicate motions to dismiss were, in fact, entertained under the 1949 Manual, although not then regarded as based on the constitutional guarantee of a speedy trial. See United States v Lea, 1 CMR (AF) 214, affirmed by the Judicial Council, 2 CMR (AF) 49; United States v Bunker, 1 CMR (AF) 567. In any event, we need not decide the correctness of this part of the accused’s argument. Whatever the practice under the 1949 Manual, we are bound by the Constitution, the provisions of the Uniform Code, and the practice under the 1951 Manual. We have specifically held that a motion to dismiss for lack of speedy trial is proper in the current practice. United States v Hounshell, supra; see also United States v Davis, 11 USCMA 410, 29 CMR 226; United States v Lamphere, 16 USCMA 580, 37 CMR 200.
On the basis of a literal reading of Article 62 (a), the dismissal of a charge for lack of speedy trial is plainly within its terms. However, appellate defense counsel contend the Article is inapplicable because the draftsmen of the Uniform Code expressly intended that the Article apply only to those motions contemplated by them. See United States v Heath, 260 F 2d 623 (CA 9th Cir) (1958). We have carefully examined the legislative history cited by appellate defense counsel as limiting the scope of the Article. The motion to dismiss for lack of speedy trial is indeed unmentioned by name. It is, however, quite clear from the testimony of Mr. Felix Larkin, one of the principal proponents of the Code, supra, which is quoted by appellate defense counsel, that the motions mentioned by him as comprehended by the Article were merely illustrative, not exclusive.2 We find *534nothing in the legislative background of the Article that even suggests an intention to exclude dismissal of a charge because of lack of speedy trial.
In support of the appeal to history as a limitation on the scope of Article 62(a), appellate defense counsel also call attention to a report on certain seminars in the office of the Judge Advocate General of the Army dealing with preparation of the 1949 Manual. They contend the report demonstrates that motions to dismiss were only those described as pleas in bar. Counsel contend that a motion to dismiss for lack of speedy trial is not a plea in bar, and this accounts for the failure to include it among those listed by the draftsmen of the Code.3 A number of Federal cases, including United States v Heath, supra, and United States v Apex Distributing Company, 270 F 2d 747 (CA 9th Cir) (1959), are urged upon us as indicating that the motion is not a plea in bar.
There is a surprising dearth of authority in the Federal courts as to the nature of a motion to dismiss for lack of speedy trial. Heath and Apex Distributing Company do not deal with that problem. They were concerned with the provision of Rule 48 of the Federal Rules of Criminal Procedure authorizing dismissal of a prosecution because of “unnecessary delay in bringing a defendant to trial.” Although it has been said that Rule 48 embodies the Sixth Amendment right to speedy trial, the two provisions are not synonymous. The Court of Appeals for the District of Columbia has pointed out that Rule 48 “places a stricter requirement of speed on the prosecution, and permits dismissal of an indictment even though there has been no constitutional violation.” Mathies v United States, 374 F 2d 312, 314-315 (CA DC Cir) (1967). We have found only one Federal case which directly holds that dismissal of a prosecution for denial of the right to a speedy trial bars reindictment for the same offense. Mann v United States, 304 F 2d 394 (CA DC Cir) (1962), certiorari denied, 371 US 896, 9 L ed 2d 127, 83 S Ct 194 (1962). See also Notes, “The Right to a Speedy Criminal Trial,” 57 Columbia Law Review 846 (1957). Although Mann has been questioned by the Court of Appeals for the Ninth Circuit in Cohen v United States, 366 F 2d 363 (1966), certiorari denied, 385 US 1035, 17 L ed 2d 682, 87 S Ct 771 (1967), the principle it sets out is, in our opinion, supported by the decision of the Supreme Court in United States v Provoo, 350 US 857, 100 L ed 761, 76 S Ct 101 (1955).
The Federal Government’s right to appeal in a criminal case is, as noted earlier, limited by 18 USC § 3731 (formerly 18 USC (1940 ed) § 682, as amended). An appeal can be taken directly to the Supreme Court from a “decision or judgment sustaining a motion in bar, when the defendant has not been put in jeopardy.” (Emphasis supplied.) In Petition of Provoo, 17 FRD 183 (D Md) (1955), the trial court granted a defense motion to dismiss for denial of a speedy trial. Purporting to proceed by virtue of the statutory authorization for appeal, the Government appealed directly to the Supreme Court. That Court affirmed the trial judge’s ruling. What is significant here is that the Supreme Court accepted appellate jurisdiction of the case. Cf. Carroll v United States, 354 US 394, 1 L ed 2d 1442, 77 S Ct 1332 (1957). “[A]ny decision,” observed the Court of Appeals in Apex Distributing Company, “which deals with the merits of an appeal . . . [and does not reserve decision as to jurisdiction] must be regarded as an adjudication that . . . [the] court had jurisdiction notwithstanding that the matter was not expressly dealt with in the opinion.” Id., at page 757. Under Provoo, therefore, a motion to *535dismiss for lack of speedy trial is a motion in bar; and, as such, it is specifically within the terms of the seminar report cited by appellate defense counsel as evidence of the kind of motions within the scope of Article 62(a). Accused’s own authorities, therefore, establish that a ruling dismissing a charge on the ground of lack of speedy trial may be reviewed by the convening authority under the provisions of Article 62(a).
We turn to appellate defense counsel’s contention that the granting of a motion to dismiss for lack of speedy trial “amounts to a judgment of acquittal” from which there is no appeal. The argument is' predicated upon a comment in the Court of Appeals’ opinion in the Heath case. This case was not based on denial of speedy trial, but on a ruling by the trial judge dealing with evidence intended to be used at trial. The trial judge had ordered the Government to make certain evidence available to the defendant for inspection and copying, as provided by Rule 16, Federal Rules of Criminal Procedure. The Government apparently had lost the records, which had been obtained from the defendant, and the United States Attorney, therefore, indicated he would probably be unable to comply with the order. Without stating any grounds therefor, the judge dismissed the indictment. Thereupon, the Government appealed to the Court of Appeals. As viewed by the Court of Appeals, the question presented by the appeal was “whether the government is by statute accorded an appeal from dismissal of indictment for inability of the prosecution to comply with the condition precedent of production” of evidence. United States v Heath, supra, at page 625. After noting that if the dismissal was for a reason that barred prosecution, it would be its “duty . . to certify the matter,” under 18 USC § 3731, to the Supreme Court of the United States, the Court concluded the motion on which the judgment was based did not involve a plea in bar because if the Government found the records it could make them available to the defendant and then proceed with the trial. It determined that the judgment of dismissal had been entered only to enable the Government to appeal from the order to produce, which is not itself an appealable order. In passing, the Court remarked that the judgment of dismissal was “equivalent to a judgment founded upon a directed verdict of acquittal.” Id., at page 632. Since the Court acknowledged that the reason for the judgment of dismissal “did not affect the merits of the charge,” it would appear that its comparison of the result with a directed verdict of acquittal was merely an observation on the practical effect of the judgment, not a determination that it constituted a finding of not guilty. Id., at page 628. As we construe Heath, it does not hold that a motion to dismiss for lack of speedy trial amounts to an acquittal or, in military terms, a finding of not guilty. Apex Distributing Company, also relied upon by the accused, was, like Heath, a dismissal for failure to comply with an order to produce. Significantly, the Court there indicated the dismissal did not prevent a second prosecution for the same offense, which is not true of a directed verdict of acquittal. It is apparent, therefore, that neither Heath nor Apex Distributing Company supports the accused’s contention that the grant of a motion to dismiss for denial of the right to speedy trial amounts to a finding of not guilty.
A motion to dismiss for lack of speedy trial does not deal with the guilt or innocence of the accused. Rather, it is concerned only with the reasonableness of the time and the circumstances in which the Government brings the case to trial. It may incidentally involve loss of evidence because of the delay, United States v Parish, 17 USCMA 411, 38 CMR 209, but it does not call into question the sufficiency of the evidence against the accused. Perhaps the best indication that the motion has nothing to do with the accused’s guilt or innocence is the fact that, in the military practice, an adverse ruling may be reviewed on appeal even though, after the ruling, the accused has entered a voluntary *536plea of guilty. See United States v Cummings, 17 USCMA 376, 38 CMR 174; United States v Williams, 16 USCMA 589, 37 CMR 209; cf. Gale v United States, 17 USCMA 40, 37 CMR 304. Since the motion does not involve the merits of the charge, a favorable ruling on the motion does not “amount to a finding of not guilty.” It follows, therefore, that a motion to dismiss for lack of speedy trial is within the general scope, not the stated exception, of Article 62(a).
Before leaving this issue, it is appropriate to comment on the convening authority’s action, not from the standpoint of his power to review, but whether his decision was correct. When reviewing a question affecting a constitutional right, an appellate authority must be circumspect in regard to findings of fact favorable to the accused. United States v Lamphere, supra. Still, it is bound to determine whether there is a substantial basis for the findings, and to reverse the ruling below if there is not. United States v Batson, 12 USCMA 48, 30 CMR 48; United States v Davis, 11 USCMA 410, 29 CMR 226. We are satisfied that the convening authority’s decision to reverse was justified as a matter of law and fact. The evidence shows an important witness had absented himself without leave for a considerable part of the pretrial period. See United States v Kaufman, 311 F 2d 695 (CA 2d Cir) (1963); United States v Palermo, 27 FRD 393 (SD NY) (1961). We hold, therefore, that the convening authority did not err in returning the charge to the original court-martial for further proceedings.
Reviewing the second trial, the accused contends the record of trial does not indicate that, as required by Article 29 (a), Code, supra, 10 USC § 829, the convening authority’s excuse of the court member was for good cause. See United States v Metcalf, 16 USCMA 153, 36 CMR 309. In material part, Article 29(a) provides that, after the accused has been arraigned, no member shall be absent or excused except “by order of the convening authority for good cause." The reason for the excuse should be set out in the record of trial. See Manual for Courts-Martial, United States, 1951, paragraph 41; United States v Grow, 3 USCMA 77, 11 CMR 77. If no reason for the member’s absence appears in the record, an appellate court will not assume that the absence was for good cause. United States v Greenwell, 12 USCMA 560, 31 CMR 146. Thus, the crucial question presented by the accused’s assignment of error is whether the accused was arraigned before or after the adjournment of the first meeting of the court. Appellate defense counsel contend the arraignment occurred before the adjournment; the Government maintains arraignment did not take place until court convened for the second session and the accused was specifically called upon to plead. Manual for Courts-Martial, supra, paragraph 65a; United States v Houghtaling, 2 USCMA 230, 8 CMR 30; see also Rule 10, Federal Rules of Criminal Procedure; Caldwell v United States, 160 F 2d 371 (CA 8th Cir) (1947).
The president’s direction to trial counsel, on reconvening the court, to “proceed with the arraignment” seems to indicate that he did not think the arraignment had been completed. However, his later comment as to the arraignment suggests that he. may mistakenly have believed the entry of a plea was part of the arraignment. See Manual for Courts-Martial, supra, paragraph 65a; United States v Houghtaling, supra. Whatever the president’s opinion as to the legal effect of the proceedings already had, we are free to determine whether the accused was arraigned on the basis of what actually transpired at the first session. Cf. United States v Pond, 17 USCMA 219, 223, 38 CMR 17.
Both parties agree that, under the Manual, the process of arraignment involves two' distinct elements: (1) Reading the charge, or having the accused waive the reading; and (2) calling upon the accused to plead. Manual, supra, paragraph 65a; see United States v Robinson, 13 USCMA *537674, 677-678, 33 CMR 206. The Trial Guide set out in Appendix 8a, Manual, supra, at pages 507-508, describes the arraignment procedure as follows:
“TC: The charges have been properly referred to this court for trial, and with their specifications, are as follows:
“NOTE. — The TC now reads the charges and specifications upon which the accused is to be tried, with the name and description of the accuser, the affidavit, and the reference for trial (pp. 2 and 3 of Charge Sheet). They are copied verbatim into the record at this point, regardless of whether the accused waives the actual reading of the charges and specifications. The accused may waive the actual reading of the charges and specifications in court (65a) :
“TC: With the consent of the accused I shall omit the reading of the charges, a copy of which is before each member of the court (, the law officer,) and the accused. The charges are signed by -, a person subject to the code, as accuser; are properly sworn to before an officer of the armed forces authorized to administer oaths; and are properly referred to this court for trial by-, the convening authority. The charges and specifications, the name and description of the accuser, his affidavit, and the reference for trial will be copied verbatim into the record.
“DC: The accused consents.
“LO (PRES) : The reading of the charges may be omitted.
“TC: The charges were served on the accused by (me) (-) on - 19-. -, how do you plead?
“NOTE. — This completes the arraignment, of which the pleas are no part (65a).
“NOTE. — Unless the date of service is at least five days prior to the date of trial in a general court-martial (three days for a special court-martial), except in time of war, the accused may object to this defect in service (Art. 35). If he does so, the court must grant a continuance at this point following arraignment.
“TC: Before receiving your pleas, I advise you that any motions to dismiss any charge or to grant other relief should be made at this time.
“NOTE.- — Motions to dismiss and for other relief, such as motions to sever, for continuance, or for examination of the accused because of suspected insanity, are properly presented at this point; all proceedings and action thereon will be recorded. See 53d, 67, and 68. Any explanation of the accused’s right to move that a charge be dismissed (53h, 68c) because barred by the statute of limitations, and the accused’s response thereto, will be recorded.
“DC: The defense [has no motions to be made] [moves that Specification-, Charge-, be dismissed because of former acquittal, on -, by a court-martial convened pursuant to-, dated-19-, of the charge of- (reciting charge and specifications in full)] [moves that • — ].”
Comparison of the Trial Guide with the transcript of the record in this case indicates that the trial proceeded substantially as the Manual provides, except that trial counsel neglected to ask the accused “how do you plead?” in advance of saying: “Before receiving your pleas, Boehm, I advise you that any motion to dismiss the charge or to grant other relief should be made at this time.” Government counsel contend that since trial counsel did not, formally and expressly, call upon the accused to plead, the arraignment was not complete. Modern criminal law does not demand rigid adherence to fixed formulas. Where a particular procedure is required, it is sufficient if the substance thereof is observed. See United States v Nelson, 3 USCMA 482, 13 CMR 38; United States v O’Brien, 3 USCMA 325, 12 CMR 81. In our opinion, notice that the accused was required to plead was clearly im*538plied in the sentence beginning: “Before receiving your pleas.” We conclude, therefore, that the arraignment was completed at the first session of the court. No member could thereafter be excused from attendance without “good cause.”
In United States v Greenwell, supra, at page 562, we held that it is the “duty . . . [of] the United States to demonstrate in the record the reasons for a member’s absence after arraignment.” We further held that a mere recital in the record that the member was “excused” by the convening authority is not sufficient to discharge the obligation. The record must “affirmatively” indicate that the reason for the member’s excuse “falls within the provisions of the Code.” United States v Grow, supra, at page 83.
The decision of the board of review is reversed, and the findings of guilty and the sentence are set aside. A rehearing may be ordered.
We reserved decision on this question in United States v Gale, 17 USCMA 40, 37 CMR 304.
The testimony is as follows:
“Mr. PHILBIN. How about section (a) there, what sort of a case would that be? Have they made a practice of dismissing some of these cases without prejudice so they may be revived?
“Mr. LARKIN. Which section?
“Mr. PHILBIN. Subsection (a) of article 62.
“Mr. LARKIN. You see, there may be any number of motions throughout the course of the trial which result in a cessation of the trial.
“Mr. PHILBIN. This says here ‘dismissed,’ where a case has been dismissed on motion.
“Mr. LARKIN. Which motion does not go to the merits of the case and does not amount to an acquittal, for instance a motion addressed to the jurisdiction which may be sustained, or a motion invoking the statute of limitations.
“Now it may well be that the law officer would grant such a motion and it turns out that he is in error, that the statute actually hasn’t run. He has computed the time incorrectly. Well, now, such a motion was not to the merits of the case. It doesn’t amount to — •
“Mr. PHILBIN. A jurisdictional question.
“Mr. LARKIN. It doesn’t amount to a finding of [not] guilty.” [Hearings before House Armed Services Committee on H. R. 2498, 81st Congress, 1st Session, pages 1178-1179. See also United States v Gravitt, 5 USCMA 249, 17 CMR 249.]
Extending the argument might leave the accused no better off than he is now. If the motion is not a plea in bar, then, as we indicate later in the text, the accused can be recharged. It is perhaps arguable that return of the charge to the court-martial by the convening authority, without objection by the accused, was tantamount to a second prosecution, with the preliminary steps waived by the accused.