National Highways Authority Of India [NHAI] — toll tax taken from defence personnel

Address:

Ahmedabad, Gujarat

My dad is currently serving in indian air force and whenever we travelled on national highways or expressways there was no need for us to pay the toll tax as defence is exempted from toll tax... But today when i was traveling from ahmedabad to vadodara with my dad and mom in our personal vehicle the employee at the toll forced us to pay the tax... We even showed him the id card but he started being rude... And after all the fighting we had to pay the tax... Is this how we treat the defence personals of india? And when did this rule came in existence that defence personals have to pay toll tax?