In 2014 I took the ez tag out of one car and used it for about 6 months in another car. No problem I only replaced it because it was not sticking well. The ez tag people said that was illegal but they checked their records and had not gotten any missed readings . I only use the toll way about 5 times a month.
Make sure you periodically check it through the night. Supposedly Steve Francis has been released on bail and has SERIOUS withdraw.