Am I being discriminated against?

My child is in Head Start. I went to the parent meeting, and was asked if I wanted to run for Policy Council, essentially their version of the school board. but, because I AM NOT THE CUSTODIAL parent of my child, I am excluded from running by the FEDERAL goverment. Is this not discrimination. And no, I did not LOSE my kids, it was an agreement between my ex and I due to school zoning etc. Is there anything I can do?