§ 904. Permissible defendants. The plaintiff, at his election, may
make defendant in the action:

1. A tenant by the curtesy or for life or for years, of the entire
property, or whoever may be entitled to a contingent or vested remainder
or reversion in the entire property, or a person having a lien or
interest which attaches to the entire property. A person specified in
this subdivision who is not made a party is not affected by the judgment
in the action.

2. A person having a lien on an undivided share or interest in the
property. The nature of the lien and the share or interest to which it
attaches shall be specified.

3. An unknown person entitled to an estate or interest in the property
sold. The court shall provide for the protection of his rights, as far
as may be, as if he were known and had appeared.

4. The state.