13 C.F.R. § 134.1004
(a) Timeliness.
(3) For negotiated acquisitions, an interested party (see § 134.1002(b)) must submit its protest by close of business on the fifth business day after notification by the contracting officer of the apparent successful offeror.
(b) Filing.
(c) Referral to OHA. The contracting officer must forward to OHA any VOSB or SDVOSB status protest received, notwithstanding whether the contracting officer believes it is premature, sufficiently specific, or timely. The contracting officer must send all VOSB or SDVOSB status protests, along with a referral letter, directly to OHA, addressed to Office of Hearings and Appeals, U.S. Small Business Administration, 409 Third Street SW, Washington, DC 20416, or by email at OHAfilings@sba.gov, marked “Attn: VOSB Status Protest” or “Attn: SDVOSB Status Protest”. The referral letter must include information pertaining to the solicitation that may be necessary for OHA to determine timeliness and standing, including: