Age issue in How Old Are You

In the Malayalam movie 'How old are you?' Manju Warrier's character is a 35 years old house wife. In an important sequence, it is being said that her driving license got expired and she was not aware of that. In Kerala, AFAIK, driving licenses are not issued to minors below 18 years (which I believe will be similar in other Indian states, too). And the issued license will be valid for 20 years from the date of issue. So she should have got her license at 15 years of age for it to expire at 35.

Is this a mistake that they missed to correct, or are there any exceptions to normal motor vehicle rule that I did not notice?

Update:

In the movie, license is used to appear in a car hit-and-run case. So it cannot be a light motor bike license, which one can get at the completion of 16 years of age.

Update #2:

The rules for license according to Kerala MVD official site.

plot-explanation how-old-are-you

Best Answer

In the film, this incident is important and had shown as one of the mains reasons for husband of protagonist to hate her like she don't give focus to the family goal of migration. And it lead him and his daughter to travel abroad without taking by leaving her alone in India.

Also the four wheeler driving licene is valid for 20 years for the first time.

So, it explain this is a movie script mistake which never exposed at the release time and gone un-noticed.