I live in PG county. I wrote a letter explaining that I was still breastfeeding my son. I believe he was almost 1yr old at the time, but i referred to him as an infant. I listed a bunch of reasons why it would be stressful on him and myself to be apart for several hours, including the need to pump and the distress he would experience beause he did not use bottles.
I don't know if that was necessary or not, but they did call me and let me know that I would be excused if I could get a letter from a health care provider stating that I was nursing my child and how long I planned on nursing the baby so that they would know when to put my name in the pool again.
I believe I told them 2 yrs. and my son's bday is coming up, so I guess I will be back in the pool soon!