LIMO bosses claim they have been forced off the road because of costly delays in getting new licences.
Owners of luxury car companies say they have lost thousands of pounds because of the new requirements, introduced in October.
The owner of one Shotts-based firm is still waiting for her licence despite applying to the Vehicle and Operator Services Agency (VOSA) in December last year.
Lisa Rafferty, 28, who runs First Class Limousines, has spent around £20,000 and fears she will go bankrupt.
She said: "I have spent tens of thousands converting all my cars and putting a new alarm system in, so that they comply with UK standards.
"Every time I phone to chase my licence up they tell you the decision is made and the paperwork just has to be finalised.
"The last thing I want is to have to turn down bookings but they have put me in a terrible position.'
"I have contacted every single customer personally but people just don't understand when you try to explain what has happened."
Andrew Adair, 49, who runs Glasgow-based Las Vegas Limousines, said: "I haven't been able to have a car on the road since October 1.
"I've spent £15,000 on each car because they are American and I've had to change the windows and tyres to meet the new UK regulations but the cars are sitting in the garage while I wait on my licence."
Vosa said: "There are only a small number of companies who offer the service to convert vehicles to meet requirements so those who have chosen to leave making their vehicles legal until now, have to wait."
Daily Retard article