(a) Service by fax (1)Agreement of parties required Service by fax transmission is permitted only if the parties agree and a written confirmation of that agreement is made. (2)Service on last-given fax number Any notice or other document to be served must be transmitted to a fax machine maintained by the person on whom it is served at the fax machine telephone number as last given by that person on any document that the party has filed in the case and served on the party making service. (b) Service