Section 403.7 - Effective dates(a)General. Except as provided in paragraphs (b) through (e) of this section, this part shall be effective on the last business day in October 1987.(b)Confirmations. The requirements of §§ 403.4 and 403.5(d) to describe the specific securities that are the subject of a repurchase transaction, including the market value of such securities, on a confirmation at the initiation of a repurchase transaction or on substitution of other securities shall be effective January 31, 1988.(c)Written repurchase agreements. The requirement to obtain a repurchase agreement in writing with the provisions described in §§ 403.4 and 403.5(d) shall be effective October 31, 1987, in the case of new customers of a government securities broker or dealer and shall be effective January 31, 1988, in the case of existing customers of a government securities broker or dealer. For purposes of this paragraph, an "existing customer" of a government securities broker or dealer is any counterparty with whom the government securities broker or dealer has entered into a repurchase transaction on or after January 1, 1986, but before July 25, 1987. For purposes of this paragraph, a "new customer" of a government securities broker or dealer is any counterparty other than an existing customer.52 FR 27947, July 24, 1987, as amended at 53 FR 28986, Aug. 1, 1988; 79 FR 38456 , July 8, 2014