THE Land Transport Authority (LTA) is concerned at the number of complaints against drivers of Public Service Vehicles regarding their code of conduct.
Authority CEO Naisa Tuinaceva has labelled the behaviour as "disturbing".
He said over the past months they've noticed that PSV drivers and operators had not been complying with the code.
The code requires PSV drivers to be more responsible and provide good customer service.
"All PSV drivers are required to maintain proper attire at all times," Mr Tuinaceva said.
"They are to deliver their service in a professional manner and ensure that safety is of essence. We have received complaints from customers about the way drivers behave and some regarding the way they dress.
"It is very disturbing to say that despite all the training we have devised, this has not been received well by these drivers."
Mr Tuinaceva said he had placed emphasis with their regional operation teams to address the issue.
"Passengers are valuable customers to these operators and they bring in sustainable business which should not be compromised," he said.
"I have made this very clear that the LTA will take action against those who fail to comply with these simple rules."