Intentionally aiding a person to enter the country illegally carries a penalty of six months to two years' imprisonment and a minimum of three strokes of the cane.
Offences involving the organisation of public assemblies or processions without the required permit, or in breach of permit conditions, carry a fine of up to S$5,000.
Individuals convicted of assisting others to retain benefits from criminal conduct may face a jail term of up to three years, a fine of up to S$50,000, or both.
One of New Chitose Airport's two runways was temporarily closed as a precaution, although flight operations on the other runway continued and were not disrupted.