(1) In general.
Except as provided in paragraph (e)(2) of this section, for purposes of section 149(d)(3)(A)(i), an advance refunding issue the interest on which is not excludable from gross income under section 103(a) (i.e., a taxable advance refunding issue) is not taken into account. In addition, for this purpose, an advance refunding of a taxable issue is not taken into account unless the taxable issue is a conduit loan of a tax-exempt conduit financing issue.
(2) Use to avoid section 149(d)(3)(A)(i).
A taxable issue is taken into account under section 149(d)(3)(A)(i) if it is issued to avoid the limitations of that section. For example, in the case of a refunding of a tax-exempt issue with a taxable advance refunding issue that is, in turn, currently refunded with a tax-exempt issue, the taxable advance refunding issue is taken into account under section 149(d)(3)(A)(i) if the two tax-exempt issues are outstanding concurrently for more than 90 days.