This excerpt taken from the THRX 8-K filed Jan 23, 2008.
(m) DTC. The Company will cooperate with the Underwriter to permit the offered Securities to be eligible for clearance and settlement through the facilities of the DTC.
(n) Issuer Free Writing Prospectuses. The Company represents and agrees that, unless it obtains the prior written consent of the Representatives, and each Underwriter represents and agrees that, unless it obtains the prior written consent of the Company and the other Underwriter, it has not made and will not make any offer relating to the Securities that would constitute an issuer free writing prospectus, as defined in Rule 433, or that would otherwise constitute a free writing prospectus, as defined in Rule 405, required to be filed with the Commission. Any such free writing prospectus consented to by the Company and the Underwriters are hereinafter referred to as a Permitted Free Writing Prospectus. The Company represents that it has treated or agrees that it will treat each Permitted Free Writing Prospectus as an issuer free writing prospectus, as defined in Rule 433, and has complied and will comply with the requirements of Rule 433 applicable to any Permitted Free Writing Prospectus, including timely filing with the Commission where required, legending and record keeping.