(4) Correction of failure to meet church plan requirements (A) In general If a plan established and maintained for its employees (or their beneficiaries) by a church or by a convention or association of churches which is exempt from tax under section 501 fails to meet one or more of the requirements of this subsection and corrects its failure to meet such requirements within the correction period, the plan shall be deemed to meet the requirements of this subsection for the year in which the correction was made and for all prior years. (B) Failure to correct If a correction is not made within the correction period, the plan shall be deemed not to meet the requirements of this subsection beginning with the date on which the earliest failure to meet one or more of such requirements occurred. (C) Correction period defined The term “correction period” means— (i) the period, ending 270 days after the date of mailing by the Secretary of a notice of default with respect to the plan’s failure to meet one or more of the requirements of this subsection; (ii) any period set by a court of competent jurisdiction after a final determination that the plan fails to meet such requirements, or, if the court does not specify such period, any reasonable period determined by the Secretary on the basis of all the facts and circumstances, but in any event not less than 270 days after the determination has become final; or (iii) any additional period which the Secretary determines is reasonable or necessary for the correction of the default, whichever has the latest ending date.
26 USC § 414(e)(4)
None identified, default scope is assumed to be the parent (subpart B) of this section.