Troopers are asked about these two issues all the time.
Troopers are asked, quite often, about the laws regarding seat belt usage. Here it is, straight from Utah Law.
41-6-182. Driver and passengers -- Seat belt or child restraint device required.
(1) The driver of a motor vehicle operated on a highway shall:
(a) wear a properly adjusted and fastened safety belt;
(b) provide for the protection of each person younger than five years of age
by using a child restraint device to restrain each person in the manner
prescribed by the manufacturer of the device; and
(c) provide for the protection of each person five years of age up to 16
years of age by using an appropriate child restraint device to restrain
each person in the manner prescribed by the manufacturer of the device
or by securing, or causing to be secured, a properly adjusted and fastened
safety belt on each person.
(2) A passenger who is 16 years of age or older of a motor vehicle operated
on a highway shall wear a properly adjusted and fastened safety belt.
(3) In accordance with Title 63, Chapter 46a, Utah Administrative Rulemaking
Act, the commissioner of the Department of Public Safety shall set standards
for approved safety belts and child restraint devices.
(4) If more than one person is not using a child restraint device or wearing
a safety belt in violation of Subsection (1), it is only one offense
and the driver may receive only one citation.
(5) For a person 19 years of age or older who violates Subsection (1)(a) or
(2), enforcement by a state or local law enforcement officer shall be
only as a secondary action when the person has been detained for a suspected
violation of Title 41, Motor Vehicles, other than Subsection (1)(a) or
(2), or for another offense.
