For an adult driving an ordinary car, which alcohol concentration meets South Carolina's unlawful-alcohol-concentration threshold?
Correct answer: 0.08% or more.
The threshold in section 56-5-2933 is 0.08%. It is not a recommended drinking target or proof that a lower concentration is safe.
Source: South Carolina Code of Laws, Section 56-5-2933(A); Unlawful alcohol concentration; current official text reviewed September 21, 2026. ↗
A driver's test reads 0.06%. Does that result automatically establish that the driver was not under the influence?
Correct answer: No; it may be considered with other evidence.
A result above 0.05% but below 0.08% creates no inference either way under this provision. It can be considered with other evidence; it is neither automatic innocence nor automatic guilt.
Source: South Carolina Code of Laws, Section 56-5-2950(G)(2); Below 0.08 is not immunity; current official text reviewed September 21, 2026. ↗
Alcohol and medication together materially and appreciably impair a person's driving ability. Does the DUI rule cover the combined effect?
Correct answer: Yes; combined alcohol and drug impairment is covered.
The statute expressly covers impairment from alcohol, other drugs or substances, and their combined influence. It does not require a crash before the prohibition applies.
Source: South Carolina Code of Laws, Section 56-5-2930(A); Combined substances; current official text reviewed September 21, 2026. ↗
A driver claims DUI rules do not apply because the impaired driving occurred entirely on private property in South Carolina. Is that a valid general rule?
Correct answer: No; the DUI article applies on highways and elsewhere in the state.
Section 56-5-20 extends Article 23, which contains the DUI provisions, beyond highways. Private property is not a general exemption from those provisions.
Source: South Carolina Code of Laws, Section 56-5-20(2); 56-5-2930(A); DUI beyond public highways; current official text reviewed September 21, 2026. ↗
Under South Carolina's under-21 alcohol-concentration provision, which test level triggers the stated license action?
Correct answer: 0.02% or more.
The under-21 provision uses 0.02%, lower than the general 0.08% unlawful-alcohol-concentration threshold. It concerns license or permit action and does not make drinking below that number safe or lawful.
Source: South Carolina Code of Laws, Section 56-1-286(A); Under-21 alcohol threshold; current official text reviewed September 21, 2026. ↗
What does South Carolina's implied-consent rule generally mean for a person arrested for an alleged impaired-driving offense?
Correct answer: Driving in the state carries consent to the specified chemical testing under the law.
The statute treats driving as consent to specified breath, blood or urine tests under its arrest and testing conditions. The law also sets procedures, notices and rights; it is not an unrestricted power to test anyone at any time.
Source: South Carolina Code of Laws, Section 56-5-2950(A); Implied consent; current official text reviewed September 21, 2026. ↗
For an adult advised under section 56-5-2950, is refusing the chemical test a way to avoid all license consequences?
Correct answer: No; refusal can suspend driving privileges.
The required warning describes suspension or denial of at least six months, with the option stated in the law for interlock-program enrollment. Refusal may be used in court, but it is not by itself an automatic criminal conviction.
Source: South Carolina Code of Laws, Section 56-5-2950(B)(1); Refusing a chemical test; current official text reviewed September 21, 2026. ↗
For an adult tested under section 56-5-2950, which concentration triggers the separate high-result administrative-suspension warning?
Correct answer: A result of 0.15% or more.
The testing warning describes suspension of at least one month for 0.15% or more, subject to the stated interlock option. This is distinct from the 0.08% unlawful-alcohol-concentration offense.
Source: South Carolina Code of Laws, Section 56-5-2950(B)(2); High-result license action; current official text reviewed September 21, 2026. ↗
After the officer-directed chemical test, what additional testing right does the statute provide?
Correct answer: Testing by a qualified person of the driver's choice at the driver's expense.
The person must be notified of the right to additional independent testing by a qualified person at their own expense. An additional test does not automatically erase the officer-directed test.
Source: South Carolina Code of Laws, Section 56-5-2950(B)(3), (D); Additional independent testing; current official text reviewed September 21, 2026. ↗
An interlock-restricted driver asks a sober passenger to blow into the device so the driver can start the car. Is that allowed?
Correct answer: No; requesting and providing a substitute sample on the driver's behalf are prohibited.
The law prohibits soliciting another person to engage the interlock on the restricted driver's behalf, and prohibits that person from doing so. The rule covers both starting and running retests.
Source: South Carolina Code of Laws, Section 56-5-2941(O)-(P); Interlock sample substitution; current official text reviewed September 21, 2026. ↗
A driver subject to an interlock requirement borrows a friend's ordinary car with no device. No legal exception applies. May the driver use it?
Correct answer: No; borrowing a car does not remove the interlock requirement.
Absent a statutory exception, the covered driver must use a vehicle with a properly operating certified interlock. The owner's permission is not a substitute for compliance.
Source: South Carolina Code of Laws, Section 56-5-2941(K); Interlock and borrowed cars; current official text reviewed September 21, 2026. ↗
A sober driver deliberately drives with a willful or wanton disregard for other people's safety. Can this be reckless driving even without alcohol?
Correct answer: Yes; reckless driving does not require alcohol.
The reckless-driving standard concerns willful or wanton disregard for the safety of persons or property. It does not require intoxication or a completed collision.
Source: South Carolina Code of Laws, Section 56-5-2920; Reckless driving standard; current official text reviewed September 21, 2026. ↗
