Safety information in public passenger vehicles

Before a domestic flight takes off, it is common to hear cabin crew informing passengers about safety rules. However, in public passengers’ vehicles we rarely hear such announcements. Does it mean that we don’t have in our laws imposing on the bus crew the obligation to inform their passengers about safety rules before departure? 
SM, Lindi

Regulation 10(2)(d) and 20(1)(e) of the Land Transport Regulatory Authority (Certification of Commercial Vehicle Drivers and Registration of Crew) Regulations, 2020 imposes on the crew of passengers vehicle an obligation to ensure the passengers are informed about safety requirement prior to the departure and throughout the journey. The problem is probably the enforcement of this law. A crew who fails to inform the passengers about the safety rules is committing an offence and liable to a fine ranging between TZS 50,000 and 200,000 or imprisonment between 1 and 12 months.