under this paragraph shall be based on standards and procedures adopted by the Administration, except that in any calendar year such audits may be initiated against no more than 3 percent of all authorized candidate campaign committees. (2) Applicable rules (A) In general If the Administration selects a committee for audit under paragraph (1), the Administration shall promptly notify the committee of the selection and commence the audit within 30 days of the selection. (B) Special rules for authorized committees If the committee selected under paragraph (1) is an authorized committee of a candidate, the audit— (i) shall be commenced and actively undertaken within 6 months of the election for which the committee is authorized