Possession of e-vaporisers is punishable by a fine of up to S$2,000, while offences involving duty-unpaid cigarettes can attract heavy fines and imprisonment.
Taylor Meyer has been convicted of fatally stabbing his wife, Deborah Meyer, on Valentine's Day last year because he believed she was having an affair.
Quinton Dixon, 44, was found dead with a "self-inflicted gunshot wound" a day after an arrest warrant was issued over alleged inappropriate messages he sent to a former student.
Under the law, a first offense can carry a penalty of up to 30 days in jail or a $500 fine, while a second violation may result in up to 90 days in jail and a $1,000 fine.
As talk of McKenna's abuse of the student began circulating at the school, the teen's friends turned over screenshots of the explicit messages to administrators in December 2022.