48 CFR § 52.233-2 - Service of Protest.
As prescribed in 33.106(a), insert the following provision:
(a) Protests, as defined in section 33.101 of the Federal Acquisition Regulation, that are filed directly with an agency, and copies of any protests that are filed with the Government Accountability Office (GAO), shall be served on the Contracting Officer (addressed as follows) by obtaining written and dated acknowledgment of receipt from ____. [Contracting Officer designate the official or location where a protest may be served on the Contracting Officer.]
(b) The copy of any protest shall be received in the office designated above within one day of filing a protest with the GAO.