Which conditions must be observed when transporting organized groups of children in buses and minibuses?

• 1Provided that mandatory instruction is conducted with the children and accompanying persons regarding the rules of safe behavior during travel and actions in the event of hazardous situations or a traffic crash.
• 2Provided that the identification sign "Children" is installed at the front and rear of the bus.
• 3Provided that the driver holds a driver's licence of category "D" and has driving experience of more than five years.
• 4Answers 1, 2, and 3.
• 5Answers 1 and 2.