(1) Any notice, objection or information that is required or allowed by these rules may be served or delivered to the department as follows:

(a) By courier delivery:

Department of Enterprise Services

1500 Jefferson Street S.E.

Olympia, WA 98504-1466

Attn: Office of the Director

(b) Or, mailed, by certified mail, return receipt requested to:

Department of Enterprise Services

Office of the Director

1500 Jefferson Street S.E.

MS: 41466

Olympia, WA 98504-1466

(c) Or, electronically mailed to department of enterprise services at the following email address: director@des.wa.gov.

(d) Service is complete upon receipt by the department.

(2) Any notice, objection or information that is required or allowed by these rules may be served by the department by U.S. mail or by any alternative means agreed to by the parties. Unless otherwise agreed, service is complete upon mailing to the contractor's address as registered with the Washington secretary of state.