851.46. Sections 851.42 and 851.43 do not apply to an indebtedness the principal of which is repaid by a taxpayer not later than 60 days after the indebtedness was incurred and that would otherwise be considered to be a limited-recourse amount solely because of the application of any of those sections unless(a) any portion of the repayment is made with a limited-recourse amount; or
(b) the repayment may reasonably be considered to be part of a series of indebtedness and repayments that ends more than 60 days after the indebtedness was incurred.