11 C.F.R. § 9035.3
(a) Aggregation of contributions and expenditures. For purposes of the limitations on contributions and expenditures of this part and part 110, contributions to, and expenditures by, the authorized committee of a candidate who becomes the nominee of a political party for the office of Vice President of the United States shall be aggregated with contributions to and expenditures by the publicly funded primary candidate who obtains that political party's nomination for the office of President of the United States, provided that the contributions to or expenditures by the authorized committee of the Vice Presidential candidate were made on or after the date on which—
(b) Exceptions. The following expenditures, if incurred by the authorized committee of a candidate who subsequently becomes the nominee of a political party for the office of Vice President of the United States, will not be aggregated under paragraph (a) of this section:
[64 FR 61781, Nov. 15, 1999]