Once I am clear on when we start counting the 90 days, my next question is: On non-residential projects, TX laws indicate the deadline is both the 15th day of the 2nd month, and the 15th day of the 3rd month, following each month in which work was performed and unpaid. (The 2nd month notice has to be sent only to the prime contractor.) Do we need to send out the monthly notice both the 2nd and 3rd months in order to perfect our lien rights? And, will those two monthly notices likely have the same amount due?