If you label the $100 as a result of the T Ins violation then T can sue you for retaliation etc.. so under any circumstance do not justify your increase because of the T failures.
You may keep your own records for the reason of the increase.
or instead offer a discount for proof of Insurance... so at a later date increase the $100 on its own. then after that offer a discount of $110 for proof of ins. this is an example of an unrelated charge/discount