The nurse’s union at Maine Medical Center say the hospital’s decision to take away some paid leave benefits is illegal.

According to CBS 13 news, the hospital has taken away paid parental leave, as well as paid leave for bereavement, jury duty and military service. The changes impact nurses, but not other employees.

Maine Medical Center responded by saying that no arrangements were made for those types of paid leave as part of their previous contract negotiations with the nurse’s union.

If paid leave is not brought back, a union representative says they could file a grievance or pursue federal labor charges through the National Labor Relations Board.