Utah Code Ann. § 58-37-8 says:
(1) Prohibited acts A -- Penalties:
(a) Except as authorized by this chapter, it is unlawful for any person to knowingly and intentionally:
(i) produce, manufacture, or dispense, or to possess with intent to produce, manufacture, or dispense, a controlled or counterfeit substance;
(ii) distribute a controlled or counterfeit substance, or to agree, consent, offer, or arrange to distribute a controlled or counterfeit substance;
(iii) possess a controlled or counterfeit substance with intent to distribute; or
(iv) engage in a continuing criminal enterprise where:
(A) the person participates, directs, or engages in conduct which results in any violation of any provision of Title 58, Chapters 37, 37a, 37b, 37c, or 37d that is a felony; and
(B) the violation is a part of a continuing series of two or more violations of Title 58, Chapters 37, 37a, 37b, 37c, or 37d on separate occasions that are undertaken in concert with five or more persons with respect to whom the person occupies a position of organizer, supervisor, or any other position of management.
(b) Any person convicted of violating Subsection (1)(a) with respect to:
(i) a substance classified in Schedule I or II, a controlled substance analog, or gammahydroxybutyric acid as listed in Schedule III is guilty of a second degree felony and upon a second or subsequent conviction is guilty of a first degree felony;
(ii) a substance classified in Schedule III or IV, or marijuana, is guilty of a third degree felony, and upon a second or subsequent conviction is guilty of a second degree felony; or
(iii) a substance classified in Schedule V is guilty of a class A misdemeanor and upon a second or subsequent conviction is guilty of a third degree felony.
(c) Any person who has been convicted of a violation of Subsection (1)(a)(ii) or (iii) may be sentenced to imprisonment for an indeterminate term as provided by law, but if the trier of fact finds a firearm as defined in Section 76-10-501 was used, carried, or possessed on his person or in his immediate possession during the commission or in furtherance of the offense, the court shall additionally sentence the person convicted for a term of one year to run consecutively and not concurrently; and the court may additionally sentence the person convicted for an indeterminate term not to exceed five years to run consecutively and not concurrently.
(d) Any person convicted of violating Subsection (1)(a)(iv) is guilty of a first degree felony punishable by imprisonment for an indeterminate term of not less than seven years and which may be for life. Imposition or execution of the sentence may not be suspended, and the person is not eligible for probation.
The charge of contributing to the delinquency of a minor is a misdemeanor and is not a bid deal. The main concern is the possession charge. Because this is his first offense, I would not expect jail time, but he may be given a deferred sentence subject to probation - this means that if he makes it through probation without another incident, he'll be past this.
My best suggestion is for you to get an attorney for your son. The best asset is an attorney that can negotiate well with the prosecutor and get your son a good deal.