Time, if stated as a number of days, is calculated using calendar days, unless otherwise specified,
and will include Saturdays, Sundays, and legal holidays. However, if the last day falls on a Saturday,
Sunday, or legal holiday, then the period shall include the next working day.
(b) Amendments to solicitations. If this solicitation is amended, all terms and conditions that are not
amended remain unchanged. Offerors shall acknowledge receipt of any amendment to this solicitation
by the date and time specified in the amendment(s).
(c) Submission, modification, revision, and withdrawal of proposals.
(1) Unless other methods (e.g., electronic commerce or facsimile) are permitted in the solicitation,
proposals and modifications to proposals shall be submitted in paper media in sealed envelopes
(i) addressed to the office specified in the solicitation, and
(ii) showing the time and date specified for receipt, the solicitation number, and the name
and address of the offeror. Offerors using commercial carriers should ensure that the
proposal is marked on the outermost wrapper with the information in paragraphs (c)(1)(i)
and (c)(1)(ii) of this provision.
(2) The first page of the proposal must show --
(i) The solicitation number;
(ii) The name, address, and telephone and facsimile numbers of the offeror (and electronic
address if available);
(iii) A statement specifying the extent of agreement with all terms, conditions, and
provisions included in the solicitation and agreement to furnish any or all items upon which
prices are offered at the price set opposite each item;
(iv) Names, titles, and telephone and facsimile numbers (and electronic addresses if
available) of persons authorized to negotiate on the offeror's behalf with the Government in
connection with this solicitation; and
(v) Name, title, and signature of person authorized to sign the proposal. Proposals signed
by an agent shall be accompanied by evidence of that agent's authority, unless that
evidence has been previously furnished to the issuing office.
(3) Late proposals and revisions.
(i) Any proposal received at the office designated in the solicitation after the exact time
specified for receipt of offers will not be considered unless it is received before award is
made and --
(A) It was sent by registered or certified mail not later than the fifth calendar day
before the date specified for receipt of offers (e.g., an offer submitted in response to
a solicitation requiring receipt of offers by the 20th of the month must have been
mailed by the 15th);