Chief Executive John Lee acknowledged on Tuesday that a new law requiring seatbelts on buses and minibuses may be inconvenient for some at first, but said the measure is essential for safety.

The tougher rules took effect on January 25. Offenders face a fine up to HK$5,000 and three months in prison.

Lee said he understands the law requires a change of habits, but stressed a small adjustment can significantly reduce serious injuries and save lives.

He noted that passengers are exempt from liability if they have a reasonable excuse.

"The law allows for a reasonable excuse, such as emergency or sudden special need, and those people will be exempted from liability. The government will handle each case with a balance in law, reason and compassion," he said.

Lee pointed out that the rule follows recommendations from an independent review committee set up after a 2018 Tai Po Road crash that killed 19 and injured 66.

Citing studies, he said seatbelts can cut serious injuries by 70 percent and deaths by 40 percent in head‑on collisions, preventing passengers from being ejected or thrown around inside vehicles.

He added that public transport operators must ensure seatbelts are clean and functional. The Transport and Logistics Bureau will continue publicity and education to explain the law’s purpose, he said.