O'HARA, J.

This is an appeal of right from a jury conviction of the charged offense of the sale of heroin. We omit the citation because the statute has since been repealed and replaced.

Five errors are assigned: First, the impermissible excuse by the trial judge of the production of a res gestae witness because the prosecution failed to demonstrate due diligence in an effort to obtain his presence. Second, the failure of the trial court to submit to the jury the "usable amount" test.

Third, erroneous instruction by reason of the trial court's reference to the unlawful use of heroin. Fourth, violation of defendant's Fifth Amendment rights by improper reference to his option not to take the witness stand. Fifth, prosecutorial misconduct in the closing argument to the jury.

We address ourselves to them in inverse order. We find no reversible error under assignment five. Discussion would needlessly extend the opinion and add nothing of precedential value to settled case law.

Assignment four was not preserved for review, and is not of that degree of gravity to move this Court to consider it.

Assignment three is disposed of on the same ground as assignment four.

Assignment number two concerns what has come to be known in our criminal case law as the "usable amount" doctrine.

The phrase was used by this Court in People v Harrington, 33 Mich. App. 548, 550; 190 N.W.2d 343, 344 (1971). Harrington was a case of first impression. The opinion authored by Judge QUINN very carefully pointed out that "[w]ithout local precedent, this Court is free to adopt the minority or majority view or to reject both."

The Harrington court characterized the "minority view" as the holding by California and Texas that illegal possession of a proscribed narcotic required proof of "[a] quantity to be sufficient for the drug's common use". 33 Mich App at 549; 190 N.W.2d at 344. The Court rejected the requirement as a restriction on efficient law enforcement.

The "majority view" so-called that the quantity of the illegally possessed drug was immaterial also was rejected as so broad as to encourage infringement upon individual rights.

The Court then set up its mid-ground test, that if the quantity in whatever amount could be reasonably inferred to have been a remnant of a larger usable amount, illegal possession was established.

Harrington's rule, formulated in a possession case, should be limited in its application to cases of close fact similarity and to charges of possession. It is inapplicable to the case at bar which is a prosecution for sale.

We reject the contention that the Harrington rule was extended to sale cases by People v Jones, 38 Mich. App. 512; 196 N.W.2d 817 (1972).

We do so first because the Jones panel explicitly distinguished Harrington on the facts. Additionally, it incorporated a requirement which might generally be characterized as a guilty knowledge and an intent factor. No such question is presented in the instant case. Six packets of some substance were purchased in this case, four of which contained heroin in some amount.

We think we do a disservice to the efforts to enforce drug control legislation by legislating judicially into statutes a requirement of qualitative and quantitative analysis of the proscribed substance.

We find no reversible error in assignment number two.

Thus we address ourselves to assignment one as also presenting a meritorious issue requiring decisional discussion.

The question is the degree of diligence required of the prosecution to produce, or alternatively to be relieved of producing a res gestae witness who is without the state. It is a murky area. This is so because of the infinity of factual variations under which the issue can arise. Decisions abound dealing with it on a single case basis. Others discuss it on a precedential principle basis. Nothing is to be gained by a review of fine line delineation. Hence, we refine the issue here to deal with the question of whether it is the burden of the people in all cases involving the production of an indorsed res gestae witness who is in another state to utilize the uniform act to secure the attendance of a witness who is without this state. MCLA 767.91 et seq.; MSA 28.1023(191) et seq.

It would be idle and even detrimental to the administration of justice to answer with an unequivocal "yes" or "no". Manifestly various fact settings mandate the allowance of the exercise of a degree of sound judicial discretion by trial judges. A requirement that a bare showing that an indorsed res gestae witness is without the state and no more obligates the state to set in motion the machinery of the statute would result in a pointless and futile expenditure of time, effort and money.

As the intermediate appellate court of this state, we are devoid of rule-making power to deal with the problem. Thus, that route is closed to us. Additionally, since we function in panels of three judges, and no one panel can bind another, we cannot, as can the Supreme Court, compel uniform compliance by trial courts in cases where panels take inconsistent positions.

So what we say here, as we understand it, will bind trial courts unless the Supreme Court stays the effect of the ruling and subsequently overrules it, or unless another panel of this Court takes a decisional position contra, thus giving the trial bench an alternative.

We here hold that where an indorsed res gestae witness is without this state and the prosecution knows what court of record, if any, in the involved state has jurisdiction to compel attendance, it is the obligation of the prosecution to present to a judge of that court process comporting in form and in substance with the requirements of the uniform statute.

If the information as to the location of the witness comes to the prosecution too late to institute proceedings and obtain a judicial determination before the time set for trial it is the further burden of the prosecution to move for an adjournment on this ground, which should be granted by the trial judge of right.

All of the foregoing is, of course, subject to the right of the defendant to waive on the record the necessity of the production or attempt to produce the witness. In that event the trial will go forward as scheduled and error may not be assigned for lack of due diligence. We hold the foregoing requirements to be effective as of the date of the release of this opinion.

By eschewing retroactivity, we perforce address ourselves to the issue of due diligence on the part of the state in this case under prior law.

The involved witness here was a police informer. He is claimed to have been a witness to the arranged sale. His testimony could hardly be more crucial to defendant. When the prosecutor advised the court of his inability to produce the indorsed witness named Branch and asked to be relieved of so doing the learned trial judge immediately inquired whether that witness had previously testified and whether any of such transcribed testimony would be offered. It is not disputed that Branch had not previously testified. Defense counsel then requested the court that the officer in charge of the case be required to testify as to his efforts to obtain the presence of the witness. He did so. His testimony reveals that Branch formerly lived in Arkansas. In November of 1971 airline tickets had been purchased for him, since he had agreed to come to Michigan voluntarily. After these arrangements had been made, the trial was adjourned on motion of defendant. Meanwhile the witness Branch moved to Florida and was married. On January 11, 1972, the trial having been scheduled for January 25, 1972, Branch was reached by phone at a number furnished by a Michigan relative of his. Branch in this phone conversation refused to give his Florida address or his own phone number. On the night before trial was to commence the prosecution obtained a Florida phone number and address for him. Branch refused to come to Michigan voluntarily. The police officer revealed his efforts in every detail.

The trial judge having first determined that no constitutional confrontation question was presented because no previous testimony had been given by Branch granted the prosecutor's motion.

Prior to our present holding this case would have been controlled by prior cases including People v Serra, 301 Mich. 124; 3 N.W.2d 35 (1942). In substance Serra adopted the "means at hand" test.

The Court held:

"The Michigan law does not make it mandatory that the prosecution apply to the court in another State for process to compel return of a witness to this State." Serra, at 131; 3 N.W.2d at 38.

Thus the prosecution may well inquire how this intermediate court imposes a greater obligation than does our Supreme Court by an opinion as yet not expressly overruled.

We answer that the Serra case was decided at a time when fewer states had enacted a uniform statute. Also the Serra court noted some sustained challenges in other states to its constitutionality. As of this date we note that only Georgia and Alabama have not adopted the uniform act. Its constitutionality is not challenged in this case. Thus we think Serra is sufficiently distinguishable upon its facts and to a degree in legal principle to permit us to act as we have herein.

We have expressly made our holding here prospective from a fixed date. We think it would be prejudicial to the sound administration of criminal justice to require the prosecution or the trial judge to have anticipated a new requirement. We hold no abuse of discretion or reversible legal error occurred under assignment of error number one, the excusing of the indorsed res gestae witness.

The conviction is affirmed.

All concurred.